Am I too skinny? Ideal weight!?!

I don't know much about what your ideal weight should be specifically, because that's hard to tell, but if you want to gain weight, you could
a) start eating only one or two big meals a day. This way, your body will recognize that you are eating less than normal. It stores fat, just in case it won't get another meal. Or,
b) Eat several big meals a day (probably the better option, but for some people it doesn't work). If this is hard for you to do, or it isn't working, you could try to eat even more (probably not good for you to stuff yourself constantly) or just eat less, option a.
Eat a huge meal right before bed. While you sleep, your body slows down and will store calories from the last big meal you had.
Avoid any exercise for a while. Let your metabolism slow so that it'll stop burning all the calories and store them instead. If you prefer to exercise, avoid cardiovascular or aerobic exercise and opt for weight lifting and muscle building exercise.
Incorporate more breads, fruits like bananas, apples, and pears, and creamy soups. Also be sure to include more protein, like fish and nuts.

300 lbs