At 5 months old she should be ready to go afield. The basic obedience should have been introduced at 7 to 12 weeks and training obedience at 12 to 16 weeks.
Buy yourself a book by Richard A. Walters, read it and LIVE by it and you will have an outstanding dog.
If you are not looking for breeding stock ignore all pedigree and focus on parents. Ask for videos of both dogs working in the field and obedience.
If they seem to do well on videos, it will increase your chance of a good pup.
There is no use in looking at 5 years of pedigree if the parents are kennel blind (dumb as rocks).
Can't say this enough. 7 to 12 weeks of a pup's age is the most important part of their life.
Buy the book as mentioned and read it and live by it. Buy the puppy at 5 to 7 weeks old, depending on state laws.One mans "started dog" may be a total nightmare for another man.
Only takes a few minutes a day to start your training. I had thirteen puppies at once (two litters) and started working with them at 4 weeks old. With that many pups and working full time job, they got less than a few minutes a day and the results were outstanding. I worked with them in the morning and in the evening.
If you have any questions let me know.
Good Luck !