What age is ok to start Minecraft with? Can you do couch coop with it? I have a steam link and some couch coop games but it doesn't work very well for my 5 and

What age is ok to start Minecraft with? Can you do couch coop with it? I have a steam link and some couch coop games but it doesn't work very well for my 5 and 7 year olds. (Steam link and steam conrollers are really finicky to set up, too). Should I just get a ps4 or xbox? And how does minecraft compare to Lego Worlds? I've played Terraria in the past, but that seems too hard for that age - at least for kids who aren't really intrinsically interested in video games like mine. Maybe one day... (Could probably google this, but I imagine there must be ppl here who have actual experience)