If I had it to do over again, I wish I hadn't bothered investing so much time looking at different methods of teaching children to read, but had instead waited until each of my children was really keen and then looked at what suited that individual child best.
If you were teaching a classful of kids then you would need to research carefully, choose the best method which you hoped would suit most of them and stick with it. But one-to-one, with no external deadlines or standardised tests to work towards, you can observe your child and be responsive to how he learns. Once you are sure he is ready and you have a good idea what sort of approach he needs, you can post back here for suggestions which are targeted to his needs and temperament. You don't have to be ready in advance.
I read up on various methods and bought some books, ready to jump in the very moment my eldest showed an interest in learning to read. I did so, and quashed her enthusiasm flat by chivvying her: "Go on, you can read that. You read it yesterday. Oh look, there's the name of the supermarket printed on the bag. What does it say?" Well, she did want to learn to read, but she didn't want to be tested, or taught in my preferred way. She didn't want reading to be the big deal I was making it out to be. I wouldn't have been so overzealous about teaching her to tie her shoes or ride a bike. She dug her heels in and claimed not even to recognise the letters of the alphabet, which she had certainly known for years. I got the message.
I backed off completely, just reading to her and answering her questions. A year later she said she wanted me to help her learn to read, and she told me how she wanted to do it. It did not match any technique I had learned about, but it was her way.
My second child has always been quite averse to being "taught" anything at all in a formal way. Unlike her sibling, but like many other home educated kids, she is rather secretive about her learning. She feels that her thought processes are her own, and she doesn't want to display them for anyone's inspection. I get an occasional glimpse of what's going on, but she makes it clear that this is not my business.
I suspect that she is learning to read for herself and will never want much instruction. Peter Gray describes how this looks. www.psychologytoday.com/us/blog/freedom-learn/201002/children-teach-themselves-read
So much for all my research!