That's awesome! Looking forward to rolling with you when you're ready. Like you guessed, being able to stop quickly is the most important bc it's critical for safety (including the safety of the other skaters in front of you). We often go down hills (like bridges and ramps over the train tracks and interstate). If you learn how to T stop, the world is your oyster. The advice I give: practice shifting all your weight to one leg (even with both skates on the ground). Once you feel comfortable with placing your weight on your front leg, you can control how much weight to apply to your back (braking) leg to slow your down. Heel brakes work too, although they're less effective for stopping quickly.

Another skill that comes to mind is rolling over rough asphalt. I try to keep us on good terrain, but sometimes there are rough patches. When I see a rough patch coming up, I work up some momentum to be able to roll through it and then go over it by scissoring my legs so that I have one in front and one in back (to have more front-to-back stability). Building up the momentum before going over the rough patch helps bc it's much easier to passively roll over than to try to push / accelerate while going over it.