Hey there Treeby I seem to have this problem at times, and I feel were not alone, I believe all new brickfilmers and even experienced brickfilmers have this problem, I think at times it can be a lack of self motivation, or just that you keep telling yourself it can't be done.
First trust yourself, and keep practicing even if you fail, just push yourself until you see your perfection, I recently got a new camera and I am really excited to start practicing I haven't been able to for a while as my old camera broke, I mean I have your problem but I am dedicated to see success as I am you and all others are to, I mean my first brickfilm was 3 minutes long and was created with a flip phone, just don't give up mate.
I fight this problem, by practicing and keeping self motivated to finishing the task, also try not have to much on your mind so you can concentrate on working on your film.
and good luck mate!
Kind regards Generalned
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