5E is the “Yes you can!” edition.
Can I play a multiclass barbarian/monk/paladin? Yes you can!
Can I cast magic missile in plate? Yes you can!
Can I start off at level 1 playing Drizzt? Yes you can!
Okay, there are still a few “no”s in here — no, you can’t wear chain maille as a druid, because druids honor nature by killing cows and wearing their skin, duh — but there’s fewer restrictions than any other edition that I can think of.