Advice Needed I want to gain weight.

Go to the doctor, talk to a specialist if you can.

Look at forum resources that speak about bulking in general and apply some of those principles. bb.com has a lot of great resources
There are some factors to consider which include the level of physical activity you currently do each day and how much and when you eat.

I am fortunate (?) enough not to have to worry about bulking (only cutting) when im dieting but it is important to take small steps and adjust your diet to see what works or gives you healthy results

Good luck

Try hitting the weights at the gym, followed by a protein shake, Eat a lot of carbs. There is a lot of things that can help you gain some weight.

The best thing I would suggest for your weight is the full fat products

The best thing In my opinion for you today would to be start lifting weights, Weight lifting is key in my opinion that literally everyone should do. You'll put on quite a lot of weight if you lift more and more each day, I lift for around 30 Minutes a day with 30 minutes of cardio, Its quite good and you should do it to.

if you want to gain weight just eat more, simple as that. but try to eat healthy not unhealthy.

I'm in the exact same boat as you are, my friend. I'm 5'9 and weigh 115 pounds... only except I just left high school lmao.

Be prepared to be called string bean and anorexic. It's never even funny

Eat enough protein lift weights make sure you get a surplus of Caliories look into a weight gainer supplement