These links take you to the sites that I use regularly for advice and guidance on practice and proceses. I also use the selling sites for paper, equipment and other materials.
An excellent site for everyone interested in printmaking. Useful videos provide good advice about processes, materials and equipment.
https://handprinted.co.uk/
The Printmakers Council is an artist run, non-profit making organization which promotes the use of traditional and innovative printmaking techniques. It mounts regular exhibitions at its London gallery.
https://printmakerscouncil.com/
Jackson'e offers a wide range of materials and equipment for printmakers. Their offer regular sales and a discount based on purchases.
http://www.jacksonsart.com