Try the very first season of
Acquisitions Inc.. The S1Ep1 recording starts part-way into a minimal bit of character creation, where a lot of other recorded campaigns don't show that bit because it tends to be kind of slow. It's obvious from the audio-only recording that at this point, at least one of the three players is pretty new to D&D, and the experienced DM Christopher Perkins introduces concepts in a very natural way, as they come up. It's funny, they are all relaxed and spend a bit of time goofing around, but the adventure gets going before too long and doesn't drag much. For me, the only downside is that it's D&D 4e, and carries on using 4e for several series before they switch to 5e (which I've not reached yet). It carried on for many more seasons, and has a big enough following they even got their own
official expansion.
The
first few videos from Dungeon Dudes on YouTube are a good intro to 5e. They've made hundreds of videos and I've only watched a fraction, but you can start with the early ones and then pick and choose what you are interested in.
If you're interested in DM'ing, look for interviews and campaigns games run by Brennan Lee Mulligan (Dimension 20) and Matt Mercer (Critical Roll).
Edit: Oh, and at the risk of stating the obvious, if you don't already have them, get yourself a copy of any one (or more) of the Starter Set, Essentials Kit or the Player's Handbook. Physical or digital on DND Beyond, either option is good. I think they may also be available on other digital platforms too, not certain.
