OK, I'll answer your original question- it's not at all unusual for a bitch not to have a first season at 9 months- anywhere between 6 and 12 months is perfectly normal, and in giant/ large breeds it can even be up to 18 mths
Regarding breeding. Firstly, as midori says JRTs, while lovely dogs, are not a breed recognised by the kennel club. Puppies are registered by the person who bred them- you can't trot along and register them later, it doesn't work like that. Not that "papers" matter (unless you are planning to breed...)
Secondly, harsh as it is, I always point out to clients keen to breed their bitch that the ONLY good reason to breed is because you are very knowledgeable about your breed, very involved in with the breed (eg through breed clubs/ shows) and are breeding from a desire to enhance the breed.
Regardless, you need to be aware that if you breed your bitch you are doing it for YOU and your own personal gain. Often at your bitch's expense. It will NOT benefit her one iota, and you could even put her life at risk. Honestly, I see so many distraught owners of bitches with dystochia- they are crying, begging me to just save their bitch, that they would never had done this if they had thought for a minute....So please, DO think for a minute about the possible outcomes. Yes, more often than not it goes smoothly, but things go wrong more often than you might think, especially with smaller dogs.
Even if the pregnancy and whelping goes smoothly, there is still scope for heartache- some small bitches suffer from eclampsia, a life-threatening condition which needs to be spotted and acted on quickly or they will die. Fading puppies are common, as are mums rejecting/ attacking puppies. There can be developmental abnormalities which can lead to the slow, sad death of pups unless you know what you are looking for. Some of these guys may even need to be euthanased.
It's not something to be entered into lightly, and I have seen many who regretted it.