Hello,
I am a software engineer and a freelancer, almost 40.
I have problems like the imposter syndrome, slow development etc etc.
But what I wanted to share, and what might help some in similar situations, is that when I am feeling completely stuck with a task, especially when starting one - when I just hate the thought of starting it, I just switch to another one - one that feels easier in that moment. Most of the time it works, because I feel different about different tasks in different moments of time.
Thanks