She would be a long-shot at best.
She is very light in her hind quarters. Most successful reining horses have very strong hind quarters. Her sire is also very short in the hip. Did he show? Did he win any money?
She should not be a high priced prospect on her breeding. She is a great granddaughter of Hollywood Dunit. Her sire is a grandson, not a son. His bottom side is 1/2 cutting. Her sire is 3/4 non-reiners.
Her dam has a lot of non-performance horses and not any reining standouts. How much money did she earn? Was she shown in the NRHA or in AQHA competition?
This filly's pedigree is 12.5% reining breeding. That makes her 87.5% non-reining breeding. Those odds are not very good unless her dam was a fluke and won a lot of money.
If a person really wants a 'real' reining horse -- one that can hold its own in decent non-pro competition, that person is going to put between $20,000 and $30,000 in training and care (shoeing, routine Vet care, etc) and that is without any problems with training, health or soundness. So, to invest that amount of time and money into a prospect, one should have a 'modern' bred reining pedigree with big name reiners and producers in the first two generations. Anything farther back than grandparents is pretty meaningless. I say 'modern' because styles have changed so much that good prospects are bred to be low-headed and super strong in the hind end so they can stop round and low-headed. Looking at the sire's photo, I see a horse with no propensity to carry his head low. He is cute headed and a striking color, but I don't see a reining prospect at all.
Anyone just starting in reining is best served by getting an older non-pro horse that is not a World beater but can still mark 72s with a good trip and a least a 70 with a fair to decent trip. Work with a decent trainer and learn to ride one and get one shown. If it works and a person likes it, they will know what they want and can go on with when they have learned the ropes and are ready to move up to a better horse. An old reining horse is the best teacher one can have as long as they are going to work with a trainer. To do it any other way would be like buying an airplane and trying to teach yourself how to fly it.