Instruments are good for muscle flexibility not for growth. I think it will better to join gym rather than buying and wasting money on instruments like this. Well, you can do if you have planned to buy weight lifting weights like dumbbells, bar, bench, etc and as well as home gyms. For guide, I think internet will be the best sources to learn exercise or doctor consultant. Gym trainer learn from experience if he is not educated. And also it will charge you. My advise is to save money and buy more instruments. About diet, you can consult the dietitian.Sorry to give free advise.