Well you got SS Vegito, best unit in the game, which is a pretty good start for a new player lol. Your best bet would be to build a Fusion/Saiyan team around him.
Core: SS Vegito (purple), Vegito (red) and SS Blue Goku (blue)
Bench: GT SS Kid Goku (green), SS Gotenks (purple) Raditz ex (blue).
Honestly you have a very strong roster for having just started. SS Blue Goku is also one of the best units in the game lol. GT kid goku is also very strong and can be subbed in if you need a blue counter. This team should honestly last you a pretty long time.