I am 6 foot and 135 pounds. I work out almost every day. Just squats and pushups to get my heart pumping. But I have a very hard time building muscle.. I guess more importantly it's very hard for me to gain weight. I can get up to 140 if eat 24 7 and feel full all day. But I'm living with little money right now and I don't have time do even do that.

So I would really appreciate some advice or guidance on how to train to still build muscle. And of course how I can gain weight.

I've looked it up for hours but still don't understand why I'm not gaining anything. I'm 22 and I suppose my metabolism just hasn't slowed down. But I'd really like to add some healthy weight on.

Do I need to eat like 3 avocados a day inbetween all of my meals ?