Am I lifting my weights correctly?

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Hi. I'm a very VERY skinny girl who barely does exercise or goes out of my own home. My metabolism is really fast and even when I try I just can't get fat. I'm tired of being skinny, lazy and weak. I want to gain some fat without actually looking fat...and be stronger as well so I came up with the option of lifting weights and gaining some muscles. For the past 2 weeks have been lifting weights every 3 days for 30 minutes-1 hour. I exercise all of my muscles with different weight positions. At first I raised the number from 3,5 and 8 which hurt like hell the next days while rested. Then lowered it to just 5 and also hurt like hell so I'm thinking of sticking with the #3 ones for now. I barely eat in fast foods either, eat lots of rice, beans and vegetables tough lack fruits in my diet and sometimes skip meals(mostly breakfast) I don't even know if I'm doing it right or should stop. All I want is to gain some fat...so yeah any help would be appreciated. Thank you. :)