I don't think its healthy to start penis exercises when in early recovery. This would be making you focus on the part of your body you want to avoid. I am speaking from experience. I was feeling great after a month of NoFap and thought I was improving everything and developing myself. With hindsight I think sub-consciously I was just giving my dick the attention I deeply want to in a supposedly healthy way. Long story short, it would swell too much and I'd end up beating off!