Its a bit late but not that late. Please remember that labs love food, so that is the trip or way of getting them to do things and train them. You dont really need a trainer or so unless you are unable to do it your self.
Start with basic obedience if you have not done it. Before giving her anything, food or a toy to play tell her to do something/ command. The simplest is to make her sit or before feeding her make her sit. Now to do that put on her leash, ask someone in the family to hold the bowl in front of her and then raise it. Ask that person to say sit to the dog. She will most likely not do anything. In that case you need to tighten the leash and push her back down till she sits and the other person should repeat the command. Once she sits down ask the person to praise her and you can pet her or/ and that person can then give her the food to eat (meal time).
First try this and once you start mastering it other commands can be taught. Any trouble msg me again.
Have fun and enjoy your dog and give her a lot of exercise and love.