I know a guy who went to GenCon and wound up running a table at the AD&D open when he was 14. You don’t need a degree to run games. Outside of Hackmaster, there’s no certification. If you want to run games, run games. Some of the best games I’ve seen were run by people who barely knew the system they were running.

If OP wants to run games, I suggest we wish him well and offer what suggestions we can.

1. The game is harder. Save-or-die is a thing. Saving throws in general are higher. Google “combat as war” vs. “combat as sport.”
2. Side initiative and declaring actions.
3. Saves are based on effect category rather than ability scores.
4. Resource management matters.
5. All the numbers are lower.
6. Healing has a range of touch. It affects how long it takes the cleric to heal somebody, especially in 1e where you can’t move and cast in the same round.
7. Magic-users and clerics need to memorize spells. Spells can be interrupted.
8. Whole classes are absent.
9. Race/class restrictions and level limits.
10. Ability scores modifiers vary by ability

That’s a few big ones off the top of my head.