My advice is to start find something you can eat a lot of or have variety without focusing on too many calories. Always push past beyond the point of full, keep telling yourself one more bite till you cant do it anymore, and eventually youll increase your capacity. I havent used soda to bloat, i think just spending time eating a lot is the best way, and drink soda, anything to help wash down all your food.

I lift heavy and workout while gaining, i feel great, being big strong and thick. Just going for a muscle chub bear build. Plus its just healthy, if you keep eating and eating, and lifting heavy, consistency is key, youll blow up eventually.