I started intermittent fasting at home and it helped a lot. For me IF cuts down on a lot of snacking just from the nature of usually being more full between those hours and being strict outside of them.
At the office we used to go for lunch all the time and the two restaurants in walking distance are a pub and an Italian place. If there were a more healthy option maybe it wouldn’t be so bad.
You could try distrosea before committing to an install.
It gives you a VM online to play around in for almost any distro you can think of.
Don’t forget that desktop environment (DE) and distro are decoupled in Linux, so if you didn’t like the feel of Ubuntu (GNOME DE) you can go with Kubuntu (KDE Plasma DE). Both are on DistroSea.