Cheers Tony that makes sense and obviously needs remedying for thatch and rhizomes....
If it was you what would you do now (before doing the bulk of it in Spring)?
I was wondering if I dont tackle the moss now its just going to go crazy and multiply everywhere?
But if I do tackle it now I will have loads of patches and then cant put any seeds down as its too cold....
The weeds I guess I wont be able to tackle until spring when they start growing again?
You are welcome mate. Its always nice to get someones interest in gardening/nature going.
Lets be honest the moss and clover is pretty bad already. Now is a good time to sort out weeds as they arent as fast growing right now but anytime is good. Not winter so much.
It wont get substantially much worse between now and next spring. If I was you (after listening to your worries) I would look to try a patch that cant be seen easily from your garden doors? and maybe put some 3in1 stuff down wait for it to do its magic and then rake it. That will give you an idea of what you will be facing and give you a clearer picture of the project. You still have a bit of time for sowing seed but you must sort the moss and clover first because seeds will not best an established plant (moss, clover).
Personaly if I hadnt done this type of thing before I would do a small area to see what Im looking at. Even if its just a 3x3m plot. Its hard to explain properly anything until you know what you are looking at. Look at the rhizome thing, that was a surprise to you but easily explained and not unexpected. With a small area even if it goes completely wrong you can fix it. Its only soil and seeds after all.
What I think you should do, when you want to. Is put some weed/moss killer down, wait for it to work then rake the hell out of it. Then I would with a garden fork aerate the soil. Roughen up the soil area a bit and spread some fine compost around the area then seeds. The a light rake and more compost.
The compost will break down into the soil and improve it slightly and give the seeds some natural food, a good growing base and shelter for a while. The after about 8 weeks the new grass will be long enough to be cut.
When you cut grass more grass blades shoot up which then eventualy forms a clump of grass. Mow again and more shoots/blades from the same grass plant. A lawn is basicaly lots of single grass plants/blades that get thicker/more plentiful with mowing/pruning.
Im probably explaining it really badly but once you start it will become clearer. As I say only do a small patch to start with. Then if you really make a mess you have a smaller area to fix.
It will be a lot of manual work but the result even if not great will be rewarding eventualy.