it honestly depends if u have the money and trainers behind u or not I have been riding since I was 6 and come from a non Horsey family and will be at prelim eventing soon. But I know a guy who started riding at 11 he’s now nearly 13 and competing at 1*
In horse riding age doesn’t matter... take a look at internationals riders, they are often 50-60 yo! Plus 10 years is totally normal, when you are younger you don’t really understand what you do🤔
I started when I was 9 and I ride once a week. I find that if you are determined and you focus properly when you do ride then you will definitely improve. Don’t be afraid to try something new and if you fall off just get back on again. Overthinking things will mess with your mind and it will most likely stop you from doing that thing that you are overthinking. Anyway, like I said I’ve been riding since I was 9 and I have come so far in those few years. Just stay determined and work hard!!