Targets

A typical spell requires the caster to pick one or more targets to be affected by the spell's magic. A spell's description says whether the spell targets creatures, objects, or something else.
A Clear Path to the Target
To target something with a spell, a caster must have a clear path to it, so it can't be behind Total Cover.
Targeting Yourself
If a spell targets a creature of your choice, you can choose yourself unless the creature must be Hostile or specifically a creature other than you.