if you dont want to go to cti school, or join the military youre chances of getting hired slim to about .0000001%
Funny. The first CTI graduate I ever trained (who was told the exact same thing you posted here) about flipped his lid when his very own little brother was hired by the FAA without taking either of those routes.
My point being (to the OP) is that over the years the song and dance of the FAA changes on who they will hire, when they will hire, and what the requirements will be. There is no rhyme or reason.
Being 24, the military is not an option for you. Both the army and the air force require 6 year enlistments for ATC. The marine corp requires 5. No idea what the navy requires but I'm sure it's along the same lines...and you'll be too close to pushing 31. But hell, maybe that won't matter because the "magic 31" number will be gone by that time.
CTI is another route, but that is not a sure thing either as it does not guarantee a job. Again, you could be halfway through the program when the FAA decides to suspend the program. Or, you could finish the program and be long past your 3 year eligibility or 31st birthday before the agency starts to hire.
Bottom line, I know you're asking for advice but there is really no solid advice to give. What the FAA is saying and doing this week will not be the same thing they are saying and doing next week, next month, or next year in regards to hiring. Keep looking on the FAA jobs page and when/if you see an announcement you are eligible for throw your hat into the ring. If you want to do a CTI program feel free...just know that it does not guarantee you anything nor does it put you at the front of some "mysterious line" for hiring.
I wish I could give you a more solid route from point A to B, but there isn't one. It all comes down to being in the right place at the right time when there is a wind shift at the agency.