Here is some tips from my experience
1. When you first start of i would recommend to turn the game to auto combo it helps out alot but dont use it on wifi people use that againts you because you cant go out of the cocmbo for the period i starts which makes it hard to defend which in the end will lead to you losing
2. dont start wifi till you have gotten alot of experience with it because its a random pick of who you will fight and most likely you will lose beacause these people have been playing forever
3. but if you still want to do wifi i would recomend theses characters to use byakuya kuchiki gin ichimaru and because hes my favorite charater hitsugaya toushiro but you would have to practice alot with him cuz hes hard to master and onther thing about him you can use his other special abilities will in bankai and if you didnt know how to do that you have to reach 3 spirtual pressure and then its super a Or super b it varies its the lowest super so if it whent from super a to Super d it would be super d
kk hope that helps if you need more help message me and i will give more info if i know it