My very first movement that I tackled was an automatic with day date complication, I managed and got it all running nicely, and it still is. However, I should have taken the advice given by many, and started with a cheaply bought simple manual wind with no day date. A lot easier for a first movement, and easier to gain an understanding of how the movement works and how all the different components interact with each other.
I would advise starting as basic as you can before moving onto automatics with day and date.

 

Sea Gull ST36 are similar money and a simple movement to practice. Plenty of videos and other material to reference.

Bear in mind Cousins postage and VAT on top of the price you see.

 

Thanks for the replies, most appreciated.
@SQ-whiff - that is good advice....I shall do some more research into simpler movements.
So many videos I've watched where experts make it look easy when working on automatics with various complications.

@al_kaholik - thanks for the info....the ST36 could be a good jumping off point.
Oops, forgot about VAT, good catch!
Had my heart set on a Seiko, but they're all automatics right?

I'll keep my ear to the grindstone!

 

Just to add
There are some nice Seiko solar/quartz watches out there if an automatic isn't your thing.

 

Thanks for your input @matty6257
It's not that automatics aren't my thing, I'm interested in disassembly/reassembly of any mechanical watch.
I have reconsidered working on the NH05 since the automatic works and the date complication would likely be quite a big step (too far) for me as an absolute beginner (good advice from @SQ-whiff )
Also the NH05 is quite a small movement, something I also didn't realise when I was browsing the Cousins website.

The suggested Seagull ST36 6497 movement looks to be ideal however (thanks again @al_kaholik )
I've found a whole load of movements and associated parts on eBay, to build an entire watch for reasonable money....I'll probably buy piecemeal however - movement first naturally, for practice.