There are a lot of advisors and stuff out there. Please be very selective if you go this route - many many are scammers. Look for sex workers with actual lived experience - and even then... don't assume they're not just trying to take off with your $$$
I can recommend Laura Savage
AmberlyPSO has her courses all free now on her website - they can be a bit of information overload but there are smart tactics in there.
I can also reccomend a book called Thriving In Sex Work - it has an entire chapter on aging that can be helpful.
But honestly - you don't need an advisor. You really just need to take it slow, learn one thing at a time and be kind to yourself. Setting a little time aside each day to do research on camming subjects will help. But yes, most of us just learn as we go along.. the level of skill i have now as compared to 10 years ago... I know know very basic coding, I'm proficient in adobe premiere, basic photoshop, I've learned what types of clients are the best and what are red flags, marketing strategies, an indepth knowledge of sexuality, fetishes, safe sex and legalities around porn that I didn't have the first clue about.
In regards to your concerns about age .. I can't speak for cb specifically as I've never cammed there but the older and fatter I get the more I charge. I'm better at what I do every month that goes by. I've gone from needing to cam constantly to barely camming and having folks lining up to book custom videos and skypes with me. I pick and choose the clients I want.