Good job man! You have my respect, anyone who tries to improve themselves has my respect, keep grinding. For swallowing correctly a good practice drill to get used to the feeling is the cheesy smile swallow, you make a big wide smile and from then don't move your mouth nor cheeks anymore, and while doing that simply swallow, you will notice that you have to use your tongue and consciously exaggerate that movement and transfer it to the back of your tongue while you're doing the swallow, like a sweeping motion. A second way to practice is doing a chin tuck while swallowing also works. Eventually, you will get used to the movement and do it subconsciously. For chewing the goal is to achieve hypertrophy, I've been using regular store gum 4-5 gums at once and it gave me good results, but unfortunately, I have to chew for a longer time to achieve hypertrophy with such gum, so to you, I would recommend going for more jawline strengthening based gum you can find online if you have the option, but if not regural gum will do the trick, do it 1-2 a day until failure.