I'm about to finalize a new computer build and plan to do everything in resolve 15. Any advice on learning Fusion?
I think FCPX and Motion is a pretty slick combo for today's fast pace. I would consider Motion to have one of the lowest thresholds for getting up to speed with basic graphics work. But I'm not sure that means it's very intuitive. After Effects has been the de facto standard for a long time and Motion works a little bit differently (still, many similarities too).
I would recommend any Apple user to try to get over that first little hump with Motion. Motions ready-to-go behaviours make it relatively easy to create animation and adjust it. A good way might be to visit any of the sites that sell 'lower thirds' and 'titles' and find something that doesn't look too intimidating and then try to recreate it in Motion, or wherever. That takes the whole "creativity problem" out of the equation.
That said, since starting out with Resolve on the side with version... hmm.. 11 I think it was, I now find that I don't open FCPX for long periods of time. BMD just keeps updating and expanding Resolve and they've promised another MAJOR release for NAB. Considering how easy it is to move from editing to compositing in Fusion to the color page... well, time invested in learning Resolve certainly must be time well spent.
Now if only the majority of clients will switch to Resolve instead of Adobe CC I'll be joining you.