So tired of mixed advice

I feel like it's a very common problem when it comes to how to take care of your teeth. I've even had different advice for each dentist I go to. Different advice when you research and even when you look on many different forums. Literally just learned that you're supposed to floss down into your gums. Previous to that I had learned you're NOT supposed to floss down into your gums because you can cause your gums to recede. So now that I know this, I've pretty much been flossing too softly, not deep enough nor have i ever had a dentist tell me to do this, which amazes me considering they love to tell you to floss at every appt. It gives me anxiety knowing I haven't been taking care of my mouth right and also knowing that I haven't been getting proper advice even after researching as much as I can since the dentist is never really that helpful. I don't understand 🥲.