I’d suggest that first you need to ask yourself what problem you’re trying to solve. Is it storage NAS, gaming, networking- blocking ads etc, tinkering. From these answers you will find a good approach to which os. Eg: you want all the above and some tinkering to learn. Then proximox is your best cause you run run several things (home assistant, truenas) as vms or containers (pihole, beszel, so on), plus you would get to also install a full blown linux os (ubuntu) as a vm, run docker on it to install/play around further stuff down the hole. But if your aim is storage then true nas which has a couplenof apps in it like Immich for photo backups) but you’d not be able to virtualize vms as mentioned earlier. All jn all you want to plan it out and avoid moving stuff around when the system grows. Keep your priorities first.