deca 300mg/wk alone is not enuf to give u sufficient gain in mass, but u will for sure gain some as its your first cycle but its a terrible waste IMO. what u sure will get is the deca dick and i am sure u havent researched enuf as only unknowledgable would do such a cycle, i am sure if u do this cycle u will have a noodle by 4th wk and u wont b able to get rid of the noodle for few more months to come. and clomid isnt much help here.
IMHO in SEARCH window type (deca dick) and read carefully all the results u c.