I started with the thumb method, which I found gave an untidy erratic edge.
35 ways to cast on?? Here's the others I know:
I progressed to the 2 needle method, which is a neater, but tighter edge:
Then I learned the long tail method
Then I learned the cast on between the stitches called Cable Cast On method
This one is by far the neatest.
How do you cast on?