That's a good way to do it with a new camera. Master the basics and then come back to these BIF type things. One of the things the guys that are good at it do, is use the back button focus. Maybe because I have photographed for 50 years without doing that, when I tried to use that I found it very uncomfortable and not intuitive at all. But the good guys do it, so if I wanted to be more serious I would need to switch that on mine.
That's too bad about the batteries on backorder.
I got this cool new battery for backpacking and when I did the wedding a few months ago, and that was where the battery had a build in USB C port in it. You couldn't charge it while in the camera because the port was on the side of the battery, but it made for a fast charge to pull it out and plug that into a USB C cable while putting another battery in.
Fortunately Nikon has been using the same battery since the D800, what 15 years ago? The version has changed, but they are all backward compatible, which is pretty nice. So for my Nikon Z8 and Z6II combo I have roughly a dozen batteries, because Mirrorless in general seem to only get 25% of the battery charge that my D850 DSLR did.