A person who desires to live alone is called a "solitude seeker" or a "solitary individual."
A hard working person with a goal.
Hermit!
A person living on investments is a person of independent means or a person who is retired.
Hermit
afraid to open up
A person who studies living organisms is called a biologist.
singer, vocalist
A cartographer
A person who laughs alone can be called a "solitarian" or simply someone who enjoys their own company and finds joy in their own thoughts.
A person living in a rural area is typically referred to as a villager or a rural resident.
Mick