What is the easiest credit card to get?

I have never owned a credit card and I am sick (absolutely sick) of dealing with my bank locking my card any time I make an out of state purchase (For those of you who are migrating to California, stay as far away from Union Bank as humanly possible)

I need an emergency credit card but I have never done anything that requires credit. What card should I get? I’m a cash/bank guy. This is all new to me.

I emphasize that I know nothing about this process.