Hey guys i got this NUTRALIFE Maximum Weight Gain product for my bday (yeah im skinny, 50kg 175cm) and i m uncertain how to consume it. Under the description it says the product is a blend of proteins + milk + carb and Branched Chain Amino Acids. I am afraid i might waste it if i dont consume it properly coz i eat quite little and heres my daily diet :

morning : milk + cerealbar/sandwich
lunch : varies, normally kopitiam stuff(chicken rice etc.)
dinner : a bowl of rice with several dishes.

So my questions are

1. how much more food do i need to eat in order to obtain substantial mass?
2. Do i need any other products to go with it?
3. Should i hit the gym or only do that after i gain mass?

Thanks in advance for your advices. I did google and apparently this brand isnt popular

can anybody give me suggestions please? thanks