Hey everyone! First post here

I have a problem with my 1995 Subaru Liberty GX with its idling issue. Basically when I start it, it idles pretty high then comes back down to the normal range but alternates to a very low rev (soundng like it could stall but it doesn't) making it shake the whole car and then goes back up and back down, so whenever I'm at the traffic lights you start feeling abit sick with all shaking going on.

When I'm driving and accelerate getting ready to change gears, as I push in the clutch the revs just continue as if I'm still pressing on the accelerator.
The Liberty seems to be missing as you can hear it in the muffler. (Can post a vid if anyone wants one)

The things leading up to it:
Check engine light on, for the coolant temp sensor - I managed to replace that and at the same time took out the IACV to see if I could clean it but it was already very clean.
Changed iginition leads (from stock) which lead to an increase in resposiveness.

Things that are noticeable:
When I'm driving(especially accelerating ) you can hear fuel getting sucked up loudly (I'm guessing fuel pump?) comingstraight from the engine bay. I didn't notice this when I first got the car over a year ago, so I think this is a new development ..

Any help would be greatly appreciated (I really don't want to bring it into the dealership,I don't have the coin and I obtained a good socket set and have already some tools from when i worked on my car last time)
I just want my little subaru back to its former glory
Thank you for reading