Blaze your trail
Check out the following Trailhead modules:
Data security: https://trailhead.salesforce.com/en/content/learn/modules/data_security
Share CRM Data with your partners: https://trailhead.salesforce.com/en/content/learn/projects/communities_share_crm_data
Protect Your Data in Salesforce: https://trailhead.salesforce.com/en/content/learn/projects/protect-your-data-in-salesforce
Keep Data Secure in a Recruiting App: https://trailhead.salesforce.com/en/content/learn/projects/keep-data-secure-in-a-recruiting-app
User Management: https://trailhead.salesforce.com/en/content/learn/modules/lex_implementation_user_setup_mgmt
