I'm a completely new Dungeon Master, and I frequently need help on the rules or balance. I was wondering if there was a way to hide posts from people who follow you, because two of my players follow me (Which is fine if you're reading this), but I fear that in the future, I may need help on balancing a encounter or a dungeon, and I don't want them knowing. Is there any way to not have specific posts notify followers?

Make a new login to D&D beyond when you want to ask something without them knowing.  Keep it until the questions you asked are used in game.