As a first time user I suspect you want mass, additionally, youve mentioned safety.
With the goal of mass, being a PH rookie, and looking for maximum safety I would absolutely go for M1D.
Once you have a cycle of that under you belt, along with a proper pct, then I would go ahead and "graduate" to MMv2 and perhaps stack it with a "wet" PH such as Dermacrine.
Also, as a first time PH user, you may not know a lot about post cycle therapy, but we make that aspect of the cycle VERY easy. Using Formadrol Extreme following your M1d (or MMv2) cycle will rebound your natural testosterone production back to normal.