

I’m currently using /e/os as there are no official custom Roms for my phone and they offer a GSI version (works on a wide variety of devices). For me it runs flawlessly, but I don’t use any apps dependent on Google Play Services, so YMMV.
I think their default apps are very usable and having MicroG on board for location services is pretty handy. Their contacts/calendar/note syncing via Murena also make the user experience quite seemless.
I’d recommend it.
Edit: If you have any questions about the OS, feel free to ask away

I think installing the apps via Aurora Store and running them should definitely work. There might be issues with syncing them to your Google account though. You can add the account via MicroG (preinstalled) but since I have no experience with running GApps on /e/os I can’t attest to how well this will work, if at all.
You can install Lineage OS and add GApps though, if you’re looking for a custom ROM but need extensive support for Google apps.
Might I ask what’s your incentive to switch to /e/os? Installing Google apps kind of counteracts the privacy aspect.