If he's struggling with reading, I'd strongly recommend the Ladybird books, which you can buy online or in shops. They're from the 1970s, but the clear way that the books are laid out make reading so much easier than today's methods. It's largely based on visual recognition, rather than phonics. Once a child can read, who cares which method they used, so long as it works for them.
If he's full of beans, does he play enough sport? Football is important for boys to bond. It's a conversation starter for the rest of their lives.
You've got plenty of time at primary school to try to get to the bottom of what issues he has. Things gather pace at secondary school and that's when children sometimes get left behind in lower sets. My son used to go in to primary school early, as the SENCO were kind and spared him some extra time, although it did mean missing out on playing with his friends in the morning, but they didn't want to put him full time in SENCO and nor did I want that for him. He was upset that some of the other children thought that he was a slow learner, but the school didn't diagnose dyslexia. I spent as much time as possible, sitting with him chatting and if he was in the mood, just reading short books with him with my finger under the words for him to watch, but he tried to resist. We always chatted about what he was learning (I'd read what topics he was learning, then just chat about it, rather than asking "what did you do at school today?") That way he kept up with everything conceptually.
At secondary school though I finally paid for an ed psych report in Y9, which was over £400. They diagnosed dyslexia and he was given 25% extra time in exams and other support.
I do know of a couple of parents who took their children out of school at primary level, then sent them to secondary school. They integrated better when they were ready for it.
Good luck,