I believe you need a custom ROM to run microG. Something like GrapheneOS, LineageOS, PostmarketOS, etc. Unfortunately my phone is too new and isn’t supported by any of them so haven’t been able to test it. Yet!

Yeah the debloater has an option to restore what you remove! I’d make take some pictures of the exact names of things just to be safe.

Look at Universal Andriod Debloater. Makes it very easy to remove whatever you want.

Your banking apps may not work if you remove Google Play services but i’ve found i can just log in through the browser instead.

Not as convenient but it feels good knowing Google can’t have any of your data.

Let me know if you have any questions about UAD!