I'm a old guy who's never played an instrument in his life. Love all types of Rock and Roll, favorite bassists are Geezer and Steve Harris. Just bought a Fender standard P, and Rumble 100. I have no idea how to even hold it. Looking for general advice: what to learn first, exercises, what to worry about later, good sites and YouTube channels, any good Android apps, etc..... Thanks in advanced. I feel like a 16 year old who's getting ready to get laid for the first time!!!