using a deca cycle in my 50’s

I’m in my early 50’s. I’ve been focused more on powerlifting over the past five or six years.
Dabbled with steroids over the years but never anything structured or disciplined. Just more of a friend gave me a vial of this or that.
Would like to get more serious and get stronger in the gym.
My plan was sustanon 500mgs a week, deca 400mgs a week. Then adding in an oral.
Would this be a sound strategy? I’m 225 pounds and 5’8’’