You need to wait as you are still young and may still grow out more facial hair. If after a few years you still have thinned out mustache or beard you may consider hair transplant at that time.
Thanks for the question. Based on your photos, the 100-400 grafts might be good option for you, but it would be wrong to say something for sure. You should see a board certified surgeon. You can then plan the process together and discuss the results. I wish you all the best.