What is the meaning of [Learn to walk before you run]

Learn basic skills first before venturing into complex things.

Example: X: I want to submit my first article to Fortune magazine for publication. Y: I think you should aim for smaller publications to start with. You should learn to walk before you run.Thinking positively and laughing will help you to feel better.

Example: I think the best thing for you right now would be to spend some time with people you can joke around with. Laughter is the best medicine, after all.