You will need to work on this as secondary schools expect the children to sort themselves out.
DD walked to and from school on her own and from Summer term had also a key to let herself in if DH wasn't at home.
She was able to make her breakfast, tidy up behind her after a meal. She doesn't have fixed chores but is expected to help when needed. So emptying the dishwasher, bringing out the rubbish, helping with the washing.
She was expected to sort out her school bag and bring. down dirty washing/clear away clean one. She changes her own bed.
We started letting her go to friends on her own incl. taking the bus and leave her in the shopping mall. She had strict rules like answering the phone or phoning back immediately and we did check on her in the beginning.
Luckily for us, she loves the independence so wanted as. much as she could get.
I would start small and built up.
Maybe get him to walk to school and back on his own. Be in charge of school bags (primary is a lot more forgiving if things are forgotten than secondary) and homework. Help him developing a system which works for him (calendar, phone alarm reminders).
If he doesn't have one, get him an alarm clock so he can wake up, shower (if he does it. in the morning) and get dressed.
Ask him to do small chores to train him and if you want make him to do some on a regular basis or at least he knows that he is expected to help.