After getting the basics out of the way during the Session Zero, it’s time to move to character generation. If you have time, I would suggest doing character generation during the Session Zero. Everyone is there, thinking about the type of game that is about to be played.
I’ve been playing some form of D&D for more than 30 years. I’ve split time as a player and as a DM. I’ve played in just about every edition from both sides of the screens. Through the years my style of DMing has changed, just as the style of DMing presented in the game has changed.
If I have one word of advice to any DM, it would be to play the game as a player as often as you can.