You must (learn to) walk before you (can) run phrase informal
Don't rush into doing something advanced before you know the basic skills, techniques and primary details
You cannot skip this step. You must learn to walk before you run.
Small things make big things so he must learn to walk before he can run.
Said when you are frightened to do something again because you had an unpleasant experience doing it the first time
1. To start an independent life and be ready to experience new things for the first time
2. To use full potential abilities or talents to try new things
3. If birds or insects spread their wings, they straighten them to full length.
Used to encourage one to accept the difficult or bad experiences that life throws upon him or her
To lose the skill or advantage one used to have in the past
The phrase may have derived from the 15th century.