I would need to solve the food texture
Well, the process of "fixing food texture" is probably mankinds oldest cultural achievement: its called cooking. Take some cookery courses - not some diet-crap, but serious gourmet-cooking. If it does not taste good, it cannot be healty.
I do not get any sort of "buzz" after excercise, I do not feel good about it, it just makes me cranky.
I guess this is quite normal - especially endurance training. If diabetes T2 is an issue, than high intensity strenght training https://en.wikipedia.org/wiki/High_intensity_training
is probably the most effective way (in terms of time and will-power employed). The idea ist to completly exhaust every major muscle group for 60 to 120 seconds, therby inducing your body to build up new muscle mass over the next view days. The new grown muscle cells - besides increasing your base calorie consumption - should show normal (i.e. not yet degenerated) insuline sensitivity.
Half an hour twice a week is quite enough and the results are readily verifiable - in terms of the increasing weights you need acheive exhaustion. The drawback is that to do it effectively, you need training machines which allow you to isolate the respective muscle groups and set the respective training weight, so you cannot do it at home.