Yes avoid binders. But keep in mind that you can have a LOT of boobs while still presenting as a man and totally fly under the radar. It is unlikely you would end up with so much boobs that it messes things up for you. But in time all changes pick up the pace and it will become impossible to hide.

Are you planning on making injectable or gel? Latter is easier to make but former is better for getting levels easily where you want it. If I were you, I would of course go for injectable, but then again, having also gel so you can quickly stabilise levels on like last day before injection is a good idea. Also when going on travels, a pump bottle is super easy to have with you.