Good luck with on the road riding. I got the full license in the summer, almost no motorbike experience but been driving a car for years so I guess that helped a bit.
Getting used to controlling the bike while paying attention to all that is going on around you is tough, but as you get used to the controls it gets easier, though will still catch you out occasionally.
For stopping and using the front brake you need to physically turn to shut the throttle and then apply the brake. For me it is like three actions, close throttle, start to squeeze lever to let the brake bite and the front suspension to compress then brake further if or as you need.
Still making mistakes but think its one of the best things I have done. Now ride nearly every day.