Sounds like you're doing fine. Don't get all worked up. Also understand, it's OK to fail. You get to try again.
Work on clearing your ears, that's the only scary thing.
Clear them gently before jumping in, just to loosen them up. Again on the surface. Again before you need to. I need to clear my ears at 15'. So I'm already pinching my nose and wiggling my jaw at 10'.
Once past 40' I don't really recall any trouble clearing ears.
Keep in mind, they'll push you if you appear to be doing well. I did the whole open water skills test in the discover scuba thingy. Mask clear, rig on, rig off, rig on, lose a reg, find a reg, clear reg, switch regs, etc.etc. Just not the solo swim.
The CESA might be scary to you. But it's easy and fun.
Getting onto a ladder that's jumping 5' in the waves is scary. When the boat goes down, that's when you climb up. Just don' t let it hit you in the head.
Swimming towards a giant spinning prop is scary. (mid engined, with a propshaft, not an outboard or anything) But it'll only push you away if you surfaced way behind the boat like you were supposed to.
So yeah, there's challenges ahead. Take em on one at a time, and relax. If it was easy everyone would be doing it, and it would be a ton less fun. You'll miss these challenges once you're certified.