What to do once you finished the Herobot is up to you. Look on YouTube, VEXForum, talk with other teams, go to competitions, and see what works and what doesn’t. Use that to build your robot and make it better. There isn’t one thing that you should do to make it so much better.
I will hint though that being able to hold another mobile goal might be a good place to start.
Ok but will there be enough room
Welcome to the forums @Team_14144A !
There is enough room for whatever you can build and fit in there. The possibilities are limitless! Well, excluding the size and motor limit. Good luck!