It's all down to what you want really. What you're comfortable with.
If you're not absolutely sure, I'd suggest a "test-gain" of 10-15 pounds. Then take some time to decide whether you want to continue or not.
As for the how, figure out the foods you like, and up your supply of them. Don't try to start stuffing too quick, or you might make yourself sick, and put yourself off of it in the future. Slowly increase your intake and capacity.
8 years
