RE: Is there a certain technique
Don't be sorry for questions.That is the best way for one to learn about anything.
As for increasing draw weight.I believe the best way to increase it is in the weight room.I have been shooting for years and I can pull MUCH more than I could starting out but I can't shoot much more poundage than I did starting out.My comfortable weight is about the same as when I started.My pulling weight has increased quite a bit but what I shoot comfortably hasn't increased that much.
The most important thing in shooting is being comfortable in your shooting and equipment so you are capable of hitting what you are aiming at.The rest will take care of itself.