How to gain weight?

Yasmin

Hi ladies, so I have been struggling with weight gain pretty much all of my life, I’m 18 now and still weigh 86 lbs, I consume just about 1700 calories each day and i started going to the gym last week. Any tips on how to gain? It is so hard for me, it feels like no matter how much I eat i never gain anything, I hate the way I look :(