See my follow up questions in red.

 

Answering your questions in the order you asked:

1) So when starting in 1st gear, it starts to barely move around 4-5k RPM. It's even worse while on a hill. At idle it's fine.

2)Not between gear shifts. Like you said it shakes while in gear and driving down the road. I do not have a video but I can try to see if I can get one. It's not a crazy bad shake to where it jerks the car, though. I don't know how useful a video would be especially since it's very inconsistent.

3) I'm pretty sure the light works because last November it was lit when it had several issues going on that have now been resolved. As of right now, it is not on and there are no noises that are different from the norm. At least nothing strange while in the car. I have to see while I'm outside of it.

I did the oil change myself since I'm very sketched out by letting anyone other than me and trusted friends touch my S2K.

4) Unfortunately, none that I know of. In the area there is a sports car auto shop, but the parking lot is full of potholes. Additionally, I think the last time I tried going there, they wouldn't take my car because it was barely too low. So, I do all of the work myself.
General location is Fayetteville, NC

 

Well the key on, engine off test will show if the indicators are working. CEL, OIL and BAT lights should illuminate right when you turn on the key. If not, then they may not be working correctly.

On the high revving, slow acceleration (And possibly that shudder/shaking one) you may have a clutch issues. If the RPM is climbing but the car is not accelerating, that is typically the clutch not engaging fully. Either worn, damaged or a hydraulic issue. That of course would not have anything to do with the engine oil level.

On that shaking while driving, a bad clutch could still be the issue (clutch having engagement issues and chattering/shuddering) but hard to say for sure without being in the car.

 

Several contradictions here such as the OP is "Very sketched out by letting anyone other than me and trusted friends touch my S2K." yet hasn't ever bothered to check the oil level in the engine which simply requires withdrawing the dipstick nor seemingly even knowing how to do it.

I'm not seeing any indication either the oil level or oil pressure was ever low -- OP doesn't know how to check the oil level or if it needs to be done -- so chasing that does not seem worthwhile.

...

-- Chuck

 

Listen, dude, I let you disrespect me (and my SO) once and let it slide. Like I said in the initial post. I get that I messed up and there is no reason to keep beating a dead horse. I do know how to check the oil, so thanks for mansplaining that. Also, if you actually read the post and retained any of the information, you would see that it wasn't something I was thinking about due to life kicking me in the ass (paraphrased: I was strung out for the past several months). I'm sketched out with people other than me or trusted friends touching the car because of a whole other issue that caused that distrust. So, unless you are going to provide something of substance, your input is invalid, and you need to hop off this thread if all you're going to do is talk shit when all I asked for was for guidance on how to fix my fvck up.

 

Okay I'll check the lights on accessory mode and let you know what's lit up when I get the chance. I'll try to attach a picture when I can.

For the clutch, do you have anything I can look at, like a YouTube video or step by step guides, to see if it's the clutch?

I appreciate your response a lot and it makes me slightly relieved that it may not be the engine.

 

Verify that your CEL and oil light does indeed work in the way that Enginfneer suggested.

Do the oil condition check and via the dipstick. Take a photo and post it here if you're not sure.

If those two things check out as OK.

Then...

Easy way to test the clutch.

Go for a drive. Get into 3rd gear and cruise at like 35-40mph.

Stomp on the gas.

If the revs shoot up disproportionately to how fast the car accelerates...you probably have a slipping clutch.

A car with a slipping clutch won't transfer engine power to the wheels. It will allow the engine to rev...but that power won't make it to the wheels.

Or...this thread indicates that "Streamline Performance" is a reputable shop in the area. Maybe check if you're close enough and give them a call to see what they suggest (tow the car? drive it?)

https://www.s2ki.com/forums/s2000-under-hood-22/engine-knocking-after-sunday-cruise-thrust-washer-failure-1219052/page20/

 

Perfect, I have a lot to do to figure out what's wrong with the S2K but I'll get what I can done today and post pictures, and maybe videos, if possible. I'll have to do the drive this weekend because that's when I have actual time to do things.

I appreciate both you and Engifineer greatly.

Give me a little bit to get back to you with pics.

 

Run an oil sample of the oil in the engine now. Just drain a little sample.

That may help determine any specific metal wear.

Good luck with your car!

 

Why dont you simply measure how much oil was in the engine? Pour the oil wich you have changed out in a empty Jug, prefered with a scale, and you could actually see and measure how much oil really was in the engine.
This eliminates all the guessing.