I Am Just Starting My Journey to Find Ancestors and Relatives My Maiden

I am just starting my journey to find ancestors and relatives. My maiden name was Crowder. I was born in Oklahoma but grew up in Southern California. My daddy was Dewey Wendell Crowder, his siblings were Warren, Ethel, Juanita and Opal. None of them are still living so I am flying blind here. I do hope I can get some help with ideas and what to do now. Thanx for any help you can give.