Compression test is easy. Go to local autozone. Rent or buy a compression tester. Unscrew spark plug. Screw in compression tester. Hold throttle wide open. Kick til guage stops moving.
If compression is low you will need to rebuild your topend. Leaktest first though. If you have an airleak nothing you do will end with the phrase "I had the best ride today"
Well when the guy rebuilt it 2 weeks before I bought it, he may have not been the brightest but hey, nor am I on this stuff. I might have to take it to R&D. Besides my front right tires ball joint is broke.
I just don't wanna have to deal with a whole top end rebuild. Sounds terrifying but in reality it's probably something I could do. But unfortunately I have no time right now to get my hand on a leak tester. Then it's either my psi is fine and it's a bigger problem or my psi is low and I still gotta rebuild the top end.