Removing Gmail completely and going for a paid privacy oriented email account with aliases seems also a good idea to me.
There are often simple easy improvements you can make in the software you use. Browser, Ad Blocker and so on. Techlore has a good resources page: Privacy & Security Resources | Techlore Recommendations
You’re Phone is also a pretty obvious thing to improve. Go for privacy preserving apps, you find on F-Droid first. Then (months later) think about another phone. A Google Pixel with GrapheneOS or a Fair Phone 6 with /e/OS.