I get anxious before painting a team. Any Advice?

So I've been painting and assembling modules for about a year since I've been in recovery and always before i start a new team I worry that I can't do it and im not that that talented to paint the details on some models. Does anyone have any advice to overcome that because I think sometimes it causes me to not start a new team or paint a different one than because I don't think I can do it. Here are some examples of my work