chaosone
Hi C1,
Getting a GrapheneOS is a very good first step all on its own, and I think it's okay to start with one thing at a time. So I would say it's still definitely worth it.
I think of the endeavour as a leaky boat, and even though Google is a remarkably big privacy hole, GOS nevertheless does plug so many other leaks...
If I were to offer further advice (most here will agree, and select few will disagree), I would say it is a very freeing decision to abandon Google entirely as one of the next few steps and you may choose to do so further down the road as well. Think of it as a journey.
I, and so many others here, have successfully moved on to other, better, services, and much advice is available in the past threads (as well as many helpful people if you need further help).
Best of luck!