Getting Help
OpenHistoricalMap has several resources for learning about the project, asking and answering questions, and collaboratively discussing and documenting mapping topics.
OHM Basics
Community maintained guide for beginners.
OHM Mailing List
Ask a question or discuss interesting matters on the OHM mailing list - sign up at the link above.
Slack
Interactive OHM chat on the openhistoricalmap channel, courtesy of OSM-US.
OHM Wiki
Browse the wiki for in-depth OHM information as well as very helpful OSM information, courtesy of the OSM Wiki.