amazon has a service where you can self publish, they create and store as a pdf & print bind & ship, 1 day after order is received. with several finishing options
i read earlier this year that it is very popular for people who would otherwise pay the upfront costs of printing a book (fairly substantial) with a niche following. since you do not have a way of judging what the market will be for a first effort, this might be a good approach
sorry i don't have more info. i believe you can just google amazon self publishing options & then scroll down below those who pay to appear above them in the search