I'm fairly new here too, so don't assume I'm right about anything.
Have you considered using separate user profiles? Especially since there is the new feature to use a different pin + fingerprint after turning on phone and using your normal pin/password for the first time, I find it really quick to switch between user profiles. Although keep in mind nothing can be shared between separate profiles (a security feature but also a challenge at times).
I have several user profiles for different things, one for general yet secure apps, one for all Google related apps, one for banking apps, etc. It is a hassle to set up, but it is yet one more way to have access to those apps that are hard to get rid of, while also separating them from your more sensitive apps.
If you're not to the point where you've sworn off Google and have switched to other websites for email, cloud storage, etc., then honestly it also isn't the end of the world for you to download Google apps for ease of use. You can decide to change this and choose a more hardened approach in the future, while not being so hard on yourself now.
I used this guide to help me get started [(https://sideofburritos.com/blog/grapheneos-how-i-install-apps/)]