Welcome to HCM.
Start good healthy diet rich in protein,carbohydrate
to become a physical strong.
Go for routine exercise regularly.
Try to avoid reading and watching of sex related things.
Concentrate your life in study,friends and family.make your life active and do all this things that you like the most(music,sports,swimming)
nightfall is not a disease so don't worry.it will disappear after your active living.