This is another tip I find very hard to follow myself. I think many of us self-criticize for not being better at things that we are just beginning. I know I do. This quote from Picasso is a good reminder that being a beginner at something is just part of the process, there is no way to jump that step: "I am always doing that which I cannot do, in order that I may learn how to do it." Pablo Picasso.
So when something is new and you're finding it hard or it's not going well, instead of feeling deflated or defeated, know that you're learning and it's part of the journey of developing a new skill.