i started playing rivals about a few months before the deluxe edition was released or whatever it was called that had the infamous alts for clairen and ranno. i used clairen and kragg and was pretty happy, but when pomme came out, she slowly became my favorite fighting game character of all time. she's so sick and im actually good with her too. a nice thing i do with her fair is kinda treat it like palu bair. i can have my back facing my opponent, and if they predict a bass boost (or moondash as i think u called it), then they will go towards the corner to try to punish it, which i then can mix it up and get my notes and my field for free as well as just gaining more stage. if they think ill fake it out and head straight in, then i bass boost anyway and then i can get a free combo / kill. oh and i play on ps4 controller and it's so nice. if u ever stray away from keyboard, dualshock 4 is my first recommendation above all.
i use wasd for directions and then my numpad for everything else. numpad 0 (thumb) for b; numpad 4 (index) for jump; numpad 8 (middle) for a; numpad 7, numlock, /, and 5 (middle reaching) for c-stick; numpad 9 (ring) for R
I've heard the F-airdash called a Bass Boost too, and both are sick names! Normally I do it out of a Reverse aerial rush to try and hit them with the back hitbox (it combo into a loooot of confirms based off their DI) - but I never even considered using moonwalking with it, that's siiiiiick
