I don't think it will happen. Arrma is more in the bashing than racing. If you want to get into racing, there is Tekno, AE, Losi, Mugen, SWorkz and there's a whole lot more. I'm 14 and had this question before and I don't think it's worth it.
If your doing it for fun, sure, but it's not worth it to doing it as an actual job.
https://www.rctalk.com/forum/threads/how-much-do-sponsored-rc-racers-make.138551/
Also not to mention, you ideally can't turn a basher into a racer, or a racer into a basher. Trying to do this with my slash and rusty. They are staying as bashers. Too much time and money trying to get them dialed in for the tracks. (clay and carpet, carpet being the hardest)
@bill_delong might have some more info for you as he is more into the 1/8 racing side.

But 1 thing I will say. If you want to get into racing. It will be best to start out at the club level. Then after a few years you can move up to like a pro or national level. I would check around for any 1/8 tracks in your area. Talk to the locals. See what their set-up is because every track is different. If that track has a local hobby shop, and if they stock arrma (which I mentioned before that it is more of bashers than racers) that will be good. Are you in the US / Canada? See if that track is on the Roar regions lists in your area. If they do a big Roar race there, you can go and check it out when it happens. You will learn lots of stuff at big races. This is what I did but at a local club race. Went to a club race, learned some stuff. Here j am racing 1/10 13.5 buggy with my B74 on carpet. First race was back in June. Still dialing in my car and learning new stuff every race night.
IMO, 10th scale might be easier for you as it is bit smaller, and less expensive than 1/8 truggy. Or even buggy. Also depends electric vs nitro. If you want to do nitro, you got to have lots of money saved up. And also from what I seen. Nitro mains are like an hour long, so you have to have at least 1 or 2 other people with you to support as your pit guy. Which can be family or friends.