Death at -10 is really a good idea for players who are new to the game.
Also, B1 is not a finished module. You as a DM need to complete it before it's ready to play. That should be fun. Enjoy it and put in some cool stuff.
The world should have wilderness and town too, not just dungeon. Players are going to need a safe place they can go back to to heal up, buy equipment, hire help, find rumors about what's going on around them, and so on. The dungeon shouldn't be everything or the PCs will quickly run out of resources and the monsters will overwhelm them.
There are a number of things in B1 from the wax statue(s?) to the bat cave to the secret rooms on level one that can all be customized by you so they follow your game. All of it needs to make sense to you if your players are going to have any chance of exploring that when you run the game.
Don't worry about character creation. Go through it yourself and iron out any difficulties so your players can do it quickly. Have the answers ready for their questions. And let them make characters on the spot. That's part of OD&D and it's very quick. Purchasing equipment takes most of the time and you can suggest that be done together with you telling them the kind of dangers they believe they will be facing (i.e. B1).