Installing Docker on Raspberry

hi everyone, I’ve been trying to install docker on my raspberry for several days and then host a project with supabase (so with docker-compose). I just can’t do it in any way, I’ve looked at various sites and guides but I always get the same problem.
I am attaching a couple of screenshots, I really hope you can help me, thank you in advance!

as root, can you try and run “dockerd” to see if that provides some usefull info?
Normally it would display the error