Am I able to do FBM and FBA?

I am interested in starting out with FBM doing RA/OA but I want to also get into FBA down the road for private labeling. Is this possible? Is this done on the same account? I have not made a seller account yet because I don’t want to screw anything up. Followup question: am I able to do both FBA private labeling and FBM OA/RA at the same time, same account? TYIA