To be honest, most fsers start sooner, 13-15 years being the average, and I sometimes feel old when I look at these small bitch*s being better than me at 21 years, haha.
But no, I dont think its too late to become a good fser, nowadays you can find tons of fs tutorials, look up learn2freestyle tutorials on yt which will give you some picture how to land certain moves and some basic advices how to get better at them. For more detailed (Lehas) tutorials, search the "Help" section of the forum or just scour the posts of "dunnowhois" .You can also check the "Training logs" section on l2f where you can find how people like Ethan, Luca or Tom Folan train.
Other than that, the both of fs forums are dead and therefore not so much useful, so I think you are more likely to get some more responses on YT or FB. Or, you can meet up with other fsers in your area, I think being in a fs community would motivate you to train harder and get better. So with all of this, you can get really good in no time. But of course, you can always just freestyle for fun, play with the ball just for fun and not care if you are too old. But you wont improve at such rate as with regular and cleverly-thought-out training sessions, obviously. Well, so thats it, I dont know what else to say, train basic combos a lot when training lowers so you will have a good style and wont look like a fool when you get to a higher level and good luck.
lol, I almost forgot you only asked if you arent too old, but never mind haha