While this is set some time ago, it is a good lead-in to pony books for pony-mad kids who haven't learnt to ride yet, and it can be quite funny as well as practical.
Jill and her mother are new to a cottage with a stable and field. Jill manages to buy a pony and tack from a nearby farmer, and then the two figure out how to put the tack on and up she gets to ride. Luckily the pony Black Boy is quiet and willing. There is little traffic so she can ride around lanes where she meets her nemesis Susan Pike who scorns her scruffy look and lack of know-how. Jill doesn't tell her mother but takes a look at herself, smartens herself up and gets riding lessons from a local gentleman who is in a wheelchair. At school she meets Ann who is a good friend with her own pony and the two start to compete in local gymkhanas (pony shows) with increasing success. Even the self-styled expert Susan has to watch out.
This was the first lone-parent family book I ever read, and the first to include a person in a wheelchair. People just looking at the pony aspect tend to forget how inclusive and ahead of its time the book was in that way. I can recommend it but teens may be bored because it is a little too simple for advanced readers.