theres no secret to building muscle or any special pills
get a routeen and stick to it this should include compond lift as the main bases
eat eat eat and eat high fat high protien high carbs you need to eat above your daily maitenance
sleep 8 hrs would be best but as much as can if 8 hrs doesnt fit in your life

6 months isnt a long time and these things take time
post your training plan and your diet and im sure people can help