On a similar note to what @lagomorphlecture I have an instant pot and that’s made cooking stuff that’s cheap but usually takes time to make really easy, brown rice or a potato based soup are a click away. At of course the cost of an upfront investment.
Also, some recipes can be really cheap if you have the time. Rossotto, homemade bread (with yeast or baking soda), baked beans (from dry bulk pinto beans), pasta (homemade & store bought) naan bread & homemade wheat tortillas, and baked oatmeal are all things I enjoy that come to mind and might be worth trying. They taste good and can be made for super cheap.
Fire up a VM to scratch that itch or change up your desktop environment if you feel like it.
Unless you have a specific need that can’t be met on your distro you’re probably not missing much other than “ooh shiny” and some fun tinkering with something new.
If it’s KDE that’s causing issues you should just be able to install a second desktop environment and try that out.
Otherwise, Debian stable is good. Can also testing or unstable if you want newer packages. Debian “just works” if you’re not on day 1 hardware, don’t have Nvidia graphics, and can troubleshoot the occasional issue that any Linux distro will bring.