Made the switch to Linux and Graphene myself last year. The thing I would say, coming from any of the tightly integrated ecosystems, is you will drive yourself insane trying to replicate their experience.

Takes a bit of adapting to the FOSS way of doing things (which is typically chaining together a few reliable systems, rather than expecting a single seamless one).

Self hosting a NAS (contacts, calendars, documents and media etc.) was also a big leap, but one I haven't regretted.

I would go to the graphene os but it doesnt support my phone :/