This is typical among newcomers to the ER community. The "excitement" is probably unsustainable.
From what I've seen, there's a few ways it can go after the initial passion/excitement wears off and the long slog to FIRE starts:
A) You can focus on FIRE. Having years and years left, you can drive yourself crazy checking account balances all the time. You'll be unhappy with your job, just thinking of FIRE. Unsatisfied with your life. Dreaming of something that seems like it's never coming, for years, and years. The irony is, when you get to FIRE, by having built it up so much, and having practiced being miserable so long, instead of practiced being happy, you likely won't even be able to enjoy FIRE the way you expected (it's not a cure all solution).
B) You can forget about FIRE, in a bad way. It seems too far off, it's too much work, you get frugal fatigue constantly trying to get your spending down, and fall off the wagon. Get frustrated with the concept, and give up.
C) You can forget about FIRE, in a good way. You can set everything automated (investing, etc.), get your savings rate super high, and stop focusing on FIRE, knowing you're on the right path, and it'll come eventually. Then work on enjoying your life and improving yourself in the meantime. Think about what you want your FIRE life to look like, and work on getting as many of those things in your life as possible now.
Obviously this third one is more ideal in outcome.
I've found that those that get the initial passion/drive for FIRE, get their lifestyle set in a way so that their spending is naturally low via the situation you set up and the mindset you choose (not continually having struggle to force low spending, which can lead to burnout/frugal fatigue) to avoid situation B, and then move on, and enjoy their life. They'll be FIRE quick enough.. five years, ten, whatever.
But don't waste your 20s and 30s pining over a FIRE and then look back and regret having wasted that time and opportunity of your life. FIRE is to gain back years of your life in time, but to throw away years of your life striving for it without enjoying the moment would be counterproductive.
Hope that helps!