I am in a similar situation. For me, it totally makes sense to learn Fusion, and that is what I am trying to do at the moment. I never really liked After Effects. It always somehow felt really messy and disorganized to me. Never really "clicked" with me.
The difficulty I'm having though, is finding training resources for Fusion. Its a pretty different program, for someone who is unused to that kind of workflow, and there seems to be very limited courses available for it. There are a few tutorials on youtube, (and thankfully a few more now that its in Resolve), but they are fairly random. And a lot of the other training seems directed at already advanced users, I guess because of the nature of the software.
I did find one really good broad overview youtube video.
After watching this, I actually felt I understood what the software was about in a general sense.
But, yeah, it definitely feels like a challenge to learn. From what I've read though, there seems to be an awareness of this in the community, so hopefully that will change. And being included with resolve should motive that somewhat.
Good luck!
Resolve 18 Studio. Windows 11 Pro. Ryzen 2700x. GTX 3060. 32GB 3200mhz DDR4 RAM. ASUS Crosshair x370.