Ok - the course is likely to be for “accreditation”. Which is basically a way of saying that she is a competent track cyclist who is safe to train and race.
Once accredited the next step is to join a club. This will help her get training and also give you access to other cycling parents who will be further along the journey than you and so can give advice. If you live close to Manchester then ESV Manchester is the obvious one as it is based at the track and they have track sessions. I have no connection but know a couple of the riders from there who are doing well. If you are not close then you may want to find a more local club although they would likely have more closed circuit (road) than track training.
Once accredited then you are able to go to both TDCs and SQTs. TDC stands for Talent Development Centre. It is the first step on the BC pathway and is designed for 12 - 16 year old accredited riders. Over the summer they take place at Manchester on a Tuesday night. SQTs (structured quality training) are run by the velodrome itself and are more based at adults. (Although kids aged 14+ can attend at least some of them.)
After TDCs the next step on the BC pathway is RSRs (regional school of racing) (aimed at 14 - 16 year olds who are racing fairly regularly).
As far as racing is concerned there are two ways to go about it. One is to attend track leagues. These take place at Manchester on a Monday and Friday night. They are good fun. However, they are probably more adults than kids with a lot of middle aged men attending. However, in 2 or 3 hours you can get 5 or 6 decent races in which is a seriously good amount.
The other option is to go for races that are aimed at kids. Monsters of the Track takes place about once a month at Glasgow over the winter and Icebreakers is similar in Newport. From a social side these are great for the kids as they will get to know others their age. (Particularly for girls as there are not many of them around!) But unless you live nearby it is a long drive for 4 or 5 races spread over a day so far less “return” for a higher “investment” compared to track league. If she is a sprinter then there are “Sprint Futures” which are spread over the different velodromes which are kid based again.
From there you can look at the NYO (National Youth Omnium) although the standard of these can be very high.
One thing that people who have been through the talent spotting say is that once the kids are accredited it can feel a bit like BC has abandoned them as they are then effectively dropped in the pool and treated like everyone else. BC wants (needs!) more riders - especially girls and especially sprinters - but it doesn’t spoonfeed. They will get you on the first rung of the ladder but then you are expected to figure it out yourself. Which is why you need a club.
I have so much more to say but going out in 3 minutes and need to go and about at my children and husband to get themselves ready!