I don’t sell direct, I don’t have a publisher, and I don’t do bulk orders. Amazon’s good at all of that and I’m not, so I let them handle it.
Paperback if you want to mark it up. Kindle if you’d rather read it on your phone — which is honestly how I’d read it.
If you’re outside the US, your local Amazon should carry it — .co.uk, .de, .com.au, the usual ones.