Get the dungeon master guide, player's handbook and a module. The player's handbook provides you with everything you need to make a character. The Dungeon master guide has all information needed for a GM to lead a basic campaign and the module is basically a premade campaign that you can just play. Making your own isn't advised if you're totally new to D&D.
Furthermore you'll need to find character sheets online somewhere and print those, so everyone can write their characters down. You'll need dice, preferably an entire set of 7 different ones for every 2 people, and a separate one for the DM. If you don't have the money for that, 2 sets could do as well. (1 for players, 1 for the DM
And that's all you need to start. As for the DM issue. There's only two ways to learn. One, to have an experienced player teach you by him being DM. Or two, by getting the dungeon master guide and reading through it. Maybe also read up on the player's handbook to get the basics of the classes and weapons and such. Having to read all that requires a lot of work, I admit, but an experienced player doesn't seem to be an option for you.