To begin with you will most likely do no more than refresh, or touch up the edge when it gets a little off. All you need for this is something around 12k. Though people used to and still do use a barber hone for this, they are around 8k.
Naniwa stones are popular but slightly more expensive than nortons or kings.
If you want a natural then I will step aside and let someone else advise, though you will probably be advised to steer clear of naturals as a starting hone as they are less predictable and therefore it is bard to give advice on their exact use, whereas a known synthetic will perform exactly the same as any other identical stone.
I tried to nut out this myself a while back, and a common progression would be 1k, 3 or 5k, 8k, 12k.
I have decided on a 1k chosera after some cajoling com a certain member here, a3k and 8k naniwa, and I already have a 10 and 12k naniwa, in hindsight the 10k was a bit of a mistake as it is kind of redundant.
I also have some.Welsh slates which are quite good too, in fact Geoff uses them on occasion so maybe he could show you when you go over.
In answer to your original question I am a fifo electrician, and my second job is working for myself on day of each of my r&r's in my own electrical business.