General

You'll get there. Eat greasy fried stuff or double/heavy cream. If you eat a bit more than normal and add an extra 1000 cal a day with these you'll put fat on.
I don't know where it will go, that's part of the adventure, but I wish my fat onto my belly and imagine it settling there and it works for me!

I had issues gaining for a while. Heavy cream on and off and trying to gain weight, then try to diet really seems to break any plateaus I hit.

I know that I may sound like a party pooper but just be aware of the health risks when gaining, you don't want to get Diabetes type 2 or hypertension so just be a little relaxed with how much you eat. Besides that good luck on your gaining adventure!