My oldest is in Yr 9 now. In year 7, he did need some help with prompting, organising, a general overview etc. (But he is quite bewildered) Year seven was quite hard for him - it's a big jump from primary school - they also seemed to gets loads of homework. It was very much a settling in sort of year.
I didn't help him much with the content per se, unless there was something he wanted to ask me, or to help him source stuff - sometimes I might clarify things for him, but largely, I let him get on with it (along with the prompting, helping him organise etc) they need to make their own academic mistakes at this level - I would say - keep an eye on the feedback he is getting and work from there. At this stage, I would say they need help to organise and prioritise, but the content should be left to them. It used to make my teeth itch sometimes - and owt I suggested in terms of content was met with "You don't understaaand!!" and sometimes even tears.
Yes tears. they have a lot to deal with at this stage. Don't underestimate how fragile they can be, and how at this stage any help can be construed as criticism/ a comment on their worth/how you can't understand etc...
Year 8 was a different kettle of fish - he was settled, he got less homework, as they eased off a bit, I found him voluntarily looking through his planner, and getting on with it himself quite successfully,so it was just a discrete eye.
Now he's year nine, and beginning the GCSE course for a few subjects. I largely let him get on with it, with a nominal look at his planner occasionally, to check things are up to date. I still have to point out to him sometimes that although this is due in on friday, he has judo on weds, dads house on thurs, to help him prioritise, but tbh, he gets it done - and I don't have to stand over him...
As far as content goes... it sounds like you are giving him some skills - like project presentation etc. Motivation is a different thing, and can be clouded by fear of failure etc
It has to be said - ds1's motivation in yr 7, was largely not getting a detention for not getting the work done - het met the lowest common denominator for a while, whilst he got to grips with it - in yr 8, he started to enjoy it, then now, yr 9, he is actually motivated to get the work done and almost enjoys it too ..
Courage mes braves...