Gaining

Just wondering if gaining is harder if you start under weight

For me it was. I started 30 pounds below the average weight for my height, and even now I'm only at the average weight. The hardest part for me was finding time to eat a normal amount of food lol

Absolutely. My first few attempts at actively gaining, when I was younger and skinny, were mostly unsuccessful. I can remember bingeing like crazy for 6 months and only putting on 15 pounds. It wasn’t until I was 30 and “slightly chubby” that the weight started to stick.