Dadof3,
This is a great time of year. With a little bit of poking around, you can likely find a good HS player or college player home for summer who would be glad to work with your son two or three times for a minimal fee. At 10, the instruction doesn't have to be (and shouldn't be) too complex or detailed but a good older player like this will spot most significant flaws in swing mechanics and make sure he has a reasonable foundation to move forward with. Besides, 10 y.o.'s usually think it's pretty cool when someone like this is helping them. These HS/college kids will usually appreciate a few bucks but really enjoy working with the younger ones and you don't have to worry about them trying to sign you up to long term commitments. And if you decide to go with a more established instructor or facility, that's OK too. Finding a situation such as what 2022 describes is awesome... When your son gets a little older and is still playing, you may need to drill down further to match hitting philosophies with your son's style and preference but that's more than you need to worry about now.
I agree with the thought that it should be something your son wants to do as opposed to something you have to encourage him to do. Every situation is different. If your son loves to play enough, and you don't have the ability to provide sound instruction, it is a good thing to help assure he is going down the right path and that his swings and reps are fundamentally sound enough that he is not reinforcing bad habits.