I use an older version of the Huion H610 Pro and I'm very happy with it. I'm not a professional user so my needs may be different from yours. There have been other threads on this subject. You might want to do a search for those other opinions.
Hi Richard,
Welcome to Affinity Forums :)
I've compiled a few learning resources (both official and from third parties) here. Check the first (Home) page and the Affinity Photo section.
The Help file that comes with the program also provides information/instructions about all program's features, don't overlook it.
If you have any questions or find any issue when trying to achieve something just ask away here. There's plenty of knowledgeable people willing to help.