Talk to the local walls about the squads , some are more selective than others, some are more fun than others, some have better coaching than others, some are more full of shit than others but, in my experience, you cannot determine which are which until you've tried them.
Register for next year's YCS (Dec-April), you don't have to be in a squad to compete. There's usually some local comps to try but I don't know about where you are.
The standard is pretty high by the time you get to the YCS finals in Ratho, most adult climbers would be happy to manage the harder routes set for the younger kids. Expect the hard routes to be circa 7b/c and harder problems to get to V6/7 or more for 13yrs depending on birth year.
Don't be put off by the grades, there's a shed load that compete despite the elite level being rather hard core. It's fine to compete without a squad but being in a squad helps with training and motivation.
Her age puts her in C or B category depending on birth year and it is bouldering and leading (no TR). Be prepared to travel...