I've just completed my NQT year (after a Schools Direct). I'm a lone parent to a 6 and 9 year old.
Firstly, I would say that the training year was WAY harder than the NQT year. There were a few occasions during my School Direct where I was so stressed that I seriously considered quitting but I can honestly say I enjoyed my NQT year.
Few tips - Agree about twinkl and TES membership. There are so many lesson plans and resources out there that just need tweaking.
Make the best of NQT and PPA time. It sounds slightly anal but I timetabled mine to avoid starting a bit of marking, then drifting into some planning, then chatting to colleagues and not actually getting anything done. Make sure he gets to watch lots of other teachers during his NQT time. I found that way more useful than most of the formal courses I attended.
Make sure he has a break in the day to eat and grab a coffee. It's tempting to stay in your class to mark/prep but you need to get some down time as well and it's a good opportunity to build relationships with colleagues (particular helpful ones!)
Depending on school policy, plan some 'sanity marking' lessons for busy times like parent's evenings or weeks where there is an observation. Find activities that don't need marking (games/whiteboard stuff that you can just put a printed note or photo in the books).
Set behaviour expectations and classroom rules from day one and stick to them. I think my biggest mistake last year was wanting the children to 'like' me and therefore probably not being tough enough on them when necessary.
Try and get some marking done during lessons. Not only is immediate and verbal feedback more effective, it means the marking load is reduced after school.
Make sure there are some evenings and a day at the weekend which are no work zones. Lower standards at home (cleaner, easy meals). I'm not sure how old your dc's are but if they can help, then rope them in (mine love being let loose on the laminator or helping sort/cut resources)
Good luck!