How can I automate the sending of emails? For instance, when a new lead is added to the database, I would like a welcome email to be sent to that lead, or schedule emails to be sent to leads.

How can I automate the sending of emails? For instance, when a new lead is added to the database, I would like a welcome email to be sent to that lead, or schedule emails to be sent to leads.

You can automate the generation of emails using workflow automation. Create a workflow rule for the leads module and choose to trigger an email on lead creation. You can either choose to send the email immediately or schedule to send it at a later date or time.
Learn more about creating a workflow rule here.