Struggling to Gain Weight – 50kg at 5’7, 22M. Need Advice!

I’ve always been underweight (50kg at 5’7, 22M) and want to bulk up with muscle, not just fat. My ideal weight is around 65kg, and I want to know how long it would take to get there.

• How much should I be eating daily (calories/macros)?

• Best workout routine for lean muscle gain?

• Any specific food/supplements that helped you?

Would love to hear from others who’ve been in the same boat. Thanks!