My biggest advice to you would be to keep your interest in the internal arts, hovever, I think that you need to do a little research on the realities of energy arts.
Ki blasts are BS.
3 weeks is not even a drop in the bucket to what some of the people on this forum have put in.
What counts here is that you have an interest in the arts. You might want to do a search on the internet for Tai Chi, Bagua, and Xingyi. These are the three 'big' internal martial arts.
Another thing that you will need to have is a ton of patience. The internal martial arts require a great deal of practice and refinement in the mind and body. (putting it very lightly)