my suggestion is create profiles for banking, just to run google apps, owner/additional profile for your personnel data and maybe another profile for experimental purposes.
but what I have done when I start using GOS is downloading all the required apps through F-droid & Aurora store (google play services downloaded but without any access) . Didn't like GOS default contact app, phone. calculator, AOSP keyboard & vanadium so I replaced those apps with google apps( I actualy disabled those apps through ADB). And after using GOS for sometime I have found some good replacements for google apps (not all)
If you want to follow my method it's better to use google play store ( can download it from GOS apps store) cause I have seen it is mentioned many times that there is a risk of using Aurora store & F-droid
My other advice is just keep your iphone till you are comfortable with using GOS/Android