Oh man, I learned the hard way that a 6-inch taping knife is way faster for that.

My first week as an apprentice, I put the entire hydraulic hose assembly together backwards. The lead tech just stared at it for a solid minute before he laughed.

Honestly, how much filler did you get? That's the key thing. A tiny bit might just settle in, but if you put a lot in young, it can look weird as your face keeps growing. I'd wait until at least 26 before adding more. Your bones are still changing shape underneath, so what looks good now might not later. It's better to let your face finish doing its thing first.