So, you have all you need to begin printing, and you may even have some instruction. Where do you go from here?
You could develop as a printer: more and more time spent printing is always nice. One way to ‘regularise’ your printing is to join an exchange group—you send, say, twenty copies of your work to a central point and you’ll get twenty other people’s work back. Some run year-round (like the Letterpress Exchange Group), some annually (like ‘It’s a Small World’ by Mike Ellison), and some for special occasions (like Christmas, New Year or Easter). These groups might depend on fixed numbers so you might not be able to join right away. Have a look or post to the LETPRESS list for opportunities.
Some hobby letterpress printers volunteer time and expertise at local museums to get experience of a wider range of machines and methods.
Learning more about printing heritage is interesting. Local museums may have pointers to printing collections. A small number of dedicated museums exist—like the Printing House in Cockermouth. Some bigger libraries hold back copies of contemporary journals, notably the British Printer. The St. Bride Library, London has an excellent specialist archive covering all aspects of printing and the allied arts.
Speaking with other people in the same position helps, too. Organisations like the British Printing Society, the Oxford Guild of Printers and the Printing Historical Society are all great sources of inspiration, help and friendship. You might also like to look at the list of Private Presses of the UK and see whether any local to you would allow you to visit.