2 answers
Hi Doug - you convert Leads for them to become a Contact record.
You should review this trailhead here: https://trailhead.salesforce.com/en/content/learn/modules/leads_opportunities_lightning_experience/create-and-convert-leads-lightning
and this help article (which includes a demo): https://help.salesforce.com/articleView?id=leads_convert.htm&type=5
