Your DSN will help you with your doses, they will have saline filled pens so you can practice, and there is several place you can inject, again your DSN will advise on this
Tell them you are shift worker and want the most flexible solution, it does mean more daily injections, 1 before each meal, and one before bed(or the same time each day), but it does get you away from set mealtimes, and is more flexible if you end up eating late
My move to insulin has not made things too much more complicated, it's certainly nothing to get worked up about