Briefly chiming just because this is something I’ve also dealt with to a degree - I can’t help with all different sources of anxiety, but one particular anxiety I have with publishing things is like the fear of a project not being good enough. Like if I feel like I should be embarrassed by it or something?
So recently, I’ve tried to frame my creative pursuits as being snapshots of my current abilities, as opposed to perfect projects. Like I’m leaving a trail behind of my progress. For me at least, this has helped take off the pressure of things needing to be perfect :P