Ah, I see. Many kids don't want to be "taught" at all, but will tolerate it sometimes. They may figure that home is their one space where they can be spared that, and their parents are people they can rely on just to love them and support them, and they don't want their parents to turn into teachers. This is especially true for kids who have had a hard time at school.
Home ed parents generally recommend a good long break from any forced academic learning when a child first comes out of school, to give them time to recover, relax, and rediscover their natural love of learning. This is called "deschooling"; you could read about it if the idea appeals to you. During this time parents can learn about possible different approaches and think about which might be worth trying with their child, while observing the child to see what engages him. Does he like to read, or listen, or watch videos, or try things himself? Is he anxious about learning some subjects? What sort of environment does he need in order to be happy - does he get grouchy if he hasn't eaten, does he learn better after 10am, does he need plenty of exercise, does he like to sit and focus for a long time or does he need lots of breaks? It takes time and experimenting to figure all of this out. But that is okay. There is no hurry.
You wait until they seem interested in learning things. If you think formal academics are the right way forward, you could introduce them slowly, starting with your son's favourite subject to get off to a good start, trying various resources until he is really enjoying it. Or you might find that he was learning loads under his own steam and you are happy to let him keep doing that, an approach which my family uses ("autonomous education" or "unschooling"). Learning doesn't have to involve being taught what the child doesn't want to learn. There are many ways to do it.
You don't have to be in a rush to jump in with a tutor. You could see how you get on without one, and then if you feel one or more tutors would be helpful, ask for recommendations in your local home ed community.