Here is the short version of my advice:
Just do it!
Don´t worry about it, don´t overthink, your main focus should be on telling
a good story. Something that you want to read yourself.
Here is how I bring ideas from the basic idea to the first draft which I will
turn into into the second draft, storyboard, sketches etc.:
I write down story beats of the story / episode. The end first.
I limit myself to 12 panels for the first draft (for stories and for comics)
One panel is already gone for the end, one for the beginning. That leaves
me with 10 panels to tell the story. I puzzle around until I have a readable
12 panel first draft which makes sense and works.
Try this for your idea, using a 12 panel limit will make things easier + I can
guarantee you that you will find out important things about your story.
The first stories that I wrote with that technique had (for example): no good
ending, no good solution to the problem, a lot of unnecessary and boring
ballast which isn´t important to tell the story and things like that. I can
write better stories now after doing that for a while