I started off at the same weight as you. I'm around 200 right now. Good diet makes all the difference. Pound out those calories (at least 3000 to start and increase by 500 after a month or so).
If you just started training, and add on a solid diet, you can easily gain about 20-30 lbs within the first 3 months.
If i were you, start off with compound movements (bench press, military press, squats, deadlifts). They will add on alot of strength and size that you'll need.