More stuff in the comments

It's heavy

For some reason Demoman worked really well for me

No way bro is using my temp 💀🗿

Heavy is sometimes hard to use, but otherwise totally

Agreed, he can't face the whole enemy team by himself

Ofc, you don't need proper aiming skills for a pyro due to the flamethrower, and you can spycheck by randomly spraying fire or spraying fire at teammates. But you can only attack close combat

What you do as a medic is mostly heal teammates. Though you need to utilize the übercharge, the medic is a pretty nice class for beginners

Heavy's minigun takes too many damage in close combat, and he can attack in a distance. Just.. the farther you are, the less dmg taken. Despite his low speed, he has high health.

Lmk if I missed out anything

yeah they all are good choices for new players