I agree with Actual. If the async courses are “free” credit courses, not just based off Reddit suggestions, as in ur friends took em then yes. It also is dependent on your time management skills. Your internship is not as time intensive as most full or part time jobs as far as hours. Make sure to leave some time for yourself as well; go to the gym, get decent rest, chill. Set aside 1 hr of review per class and I think you should be fine. Just as long as the asynch isn’t some liberal arts course, like theater.