I'm a sr level network guy (CCIE + big network experience). I'll say this, yes there is a lot of $$ to be made. My total comp is around $170k so good for FIRE. Also great opportunities for part time/consulting after FI.
Let me say this though. If you're not passionate, disciplined, ethical and have the mind for this field.... you will not make it to that level. It is not a job where you can fake it, except at the very low levels. Not saying this is you, just know what you're getting into. It's an engineering discipline. :)
With that said if you want to go full steam ahead do your low level certs. I'm not saying the certs themselves matter so don't just focus on the pass (there are cheats out there) but learn the material. Network+, then CCNA. Try to find work at this point even if it's jack of all trades stuff.
After you have some network experience go for the CCNP. This very includes almost all of the knowledge even a sr level person needs, but again a lot of people cheat it. Don't. Learn it! OSPF, BGP, MPLS, switching ARE your job, why would you not want to be an expert???
Get higher level work, preferably for a Cisco reseller. You'll get exposed to a ton of different networks and businesses. You'll get used to project work and pressure. You'll get used to being seen as an authority which is important for later on.
You're probably 3-5 years in at this point and can think about the CCIE. It's a bitch of a test and not absolutely required for FIRE since you can make high 5 figs/low 6 figs without it. It's a significant time investment at 15-20 hours a week for probably a year or so to be legitimately ready for it. And it's $1500 + travel to go take the lab which you'll probably fail a time or two before passing. Once you pass though you've got instant employment at mid 100's in any city in the US and very highly respected.
That's the path I'd take and it is realistic. I started at 30 and was into 6 figures well before 40. Wish I'd known about this site sooner though, lol!
Good luck and feel free to message me if you do want to go the network route, happy to provide more detailed advice.