You make it sound like all distros are paid, not free. With that said... all distros can deliver the same quality as you'd expect out of a "stable OS". Still, theres Nobara, Linux Mint, ZorinOS and Garuda for your "noob-friendly" needs.
HoloISO if you -REALLY- want to have a "steamdeck-like" experience. Unless if you mean "steam focused" as in "gaming focused"....? Then (pretty much) any distro you want -- as long as its a minimal install. Tweak it to your needs, make steam run when you log in. And thats it.
I remember the first time I managed to run Doom outside of the usual "point-and-click mentality" on ZorinOS. It felt like I went back to the DOS era where I had to do the good ol' SETUP.EXE to setup the soundcard, etc.
But yeah -- you've got to let go your "do it for me" mentality and start to get used to do the stuff yourself. But it gets easier when you get used to it.
It seems that Debian-rock64.img is an armhf image (i.e 32 bits) and Debian-arm64.img is (obviously) an 64 bit image... so go for the latter if your board has 8 GiB ram and up and the former if 4 GiB ram and under.
Thing is... you won't convince that the other fella is wrong by telling him to lick your asscheeks. You are just being offensive.
Even if it means saying a fact straight to that fella and receiving a simple "LMAO" back -- guess what? You already won. His "LOL" was pretty much a signature under "Me, a fellow random, admit that I just got told by this guy."
You've got to respect everyone, yes -- and point out the wrongs in the other person's opinion. Because if you just respect... then you are (also) being heedless.
More like, you become enslaved by (whatever gives your "dopamine fix"), getting you closer of being a literal "zombie" (Does not rationale -- relies "everything" on its dopamine source).
Something something "the human brain wasn't made for constant dopamine hits that an automated system provides". And not being addicted to such system makes you a better human (non-addicted, critical thinking individual.).
Or, in other words -- we are made to conquer. Not being conquered -- specially by machines.
"Dad! How do I find a perfect girlfriend?"
"You just have to wait for a random bot from an unknown, doubtful place/location to do that for you my son."