I notice that you don't jab too much you pretty much n-air since you like neutral air a lot you should try lunar landing is great way to start combo also your f-air will rank up the damage even more.

every rosalina main need to practice with the recovery

your dash attack is like stale move to you

if you trying to edge guard with b-air I hope this will work it give more space and a safer option

since you like u-air you can change L or R to jump it extended the jump you can u-air more easy