Same here actually, ~10 years too lol, since my first Android. SwiftKey worked very well (for me at least) but its owned by Microsoft, which gathers user data. I’ve been making a switch to FOSS apps and trying to degoogle myself in the recent months.
It was hard for me to leave SwiftKey due to other options being unsatisfactory / other keyboards always missing something, but HeliBoard did the trick for me :)
Came here for this.