Database design - need someone to guide me
Learn Table Inheritance (aka subtype/supertype)

Individual   : Legal Party (":" meaning "inherits")
Organization : Legal Party

Email          : Address
Phone          : Address
MailingAddress : Address
WebURL         : Address

LegalParty -&lt; PartyRelationships &gt;- LegalParty
LegalParty -&lt; ContactInfo &gt;- Address

Read up on existing data model patterns. Don't re-invent the wheel