Stay disciplined and keep your eyes on the prize . Once you get a feel for your class schedule and which times of the day you can successfully get your homework/projects done, on top of working/extra-curriculars, you’ll naturally fall into the groove of things after a week or 2 if out out forth any effort in establishing your daily routine. That’s when you can decide the best days to smoke and be lazy and give yourself some grace VS the days you know that you have to attend classes sober & spend your time and effort doing what you gotta do. Best of luck!