Gain Weight

Azariah💋 • 17 and waiting until marriage!
Hey guys! I have a weight goal but it's to gain weight....I'm around 130 lbs and I'm 5'8" but I still feel too skinny and I want a thicker figure. Does anyone have any tips on how to gain weight (muscle) and not fat just by eating more junk food? Or any exercises that help with this?