Future Learn: Genealogy – Researching Your Family Tree https://www.futurelearn.com/courses/genealogy
Family Tree Magazine https://www.familytreemagazine.com/
General guidance http://www.bbc.co.uk/history/trail/familyhistory/family_trees/research_family_tree_01.shtml
Scotland in particular https://www.scotlandspeople.gov.uk/guides/family-history