Anyone gone from general training to “fighter class” that can share their experience?

I’ve been training at my gym twice a week for about 9 months now. I train at home with a heavy bag as well at least two more days of the week, including conditioning.

I’m pretty comfortable sparring now but didn’t think about competing due to lack of time. So I got pretty comfortable with this routine.

The other day coach said he wanted to invite me to the fighter’s class but was amused/surprised when he and some of the team realized I was 35 and not 25 years old.

Anyone have a story of taking a similar plunge at this age and either thriving or struggling? What did it involve in your experience?

I’m 5’,9” 150 in decent shape for whatever that’s worth but not sure what I’d be getting myself into at this age so I’d love to hear from others

Thanks for reading!