Since you are just starting out, I would not beat yourself up about your field point groups. They will tighten up as you practice and your form and muscle memory improves. Though you may not have the perfect arrows for your bow, most of your variation in shot groups right now is probably more related to your form. This should not prevent you from choosing the right arrow and point combination now, before you get to the fine tuning, otherwise it will be a pain later (and after you bought 1-2 dozen of the wrong arrows). Improving your form will tighten your groups to a point, then tuning may improve that further. If your form is not perfect, then even with a perfectly tuned bow, your shot group will be large. The process of tuning your bow and improving your form can all be done at the same time, but don't think that shot variation is all due to improper tuning. When you move on to broadheads, then your groups will expand and the broadheads will likely shoot right or left, possibly even higher or lower than your field tips. Tuning the broadheads is actually considered "fine" tuning. I would hold off on moving to broadheads until your bow is "gross" tuned and you are consistently shooting field tips. That likely means that your form is not too bad.