Hi, how can i get more weighs bec i am so week and i want to get weighand i want to be healthy but i cant ?

eat banana and milk in the time of evening, but mind, u have to do exercie, if u can do this than plz buzz me i would suggest u many ideas to get good health, in this qstion u didnt mage your height,than it will be good for me to suggest u better ideas to get good health, buzz me on vishu_bharal