How to train an untrained dog?

So my brother got a dog that was a year old, she is mostly black lab but is a mut. She is very smart tho. he had her for a while and was going to train her but he got a job and does not have time. He just now gave her to me and she is about 1 1/2 years old. She comes to her name but that is it. How would I go about training her to point under a PRT for squirrels and rabbits? I really have no idea where to start. Any links to videos and/or advice would be VERY much appreciated.
Thank you so much, Luke Ryan

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