So... This is kind of my process so far and I thought someone would find useful to know that I basically get urges to draw when something catches my eye (like the middle shirt by Japanese artist Kansai Yamamoto).

I used a blue pen for the sketches because it was what I had at hand and I can't recommend enough that if you have a drawing in your mind and NEED to get it out of your system, please don't wait, use a pen, a cheap lipstick and a napkin, whatever you can, waiting for a tablet or the "right tools" is not always good, sometimes I have in mind ideas I really like but I wait till I can get to my computer and by then I usually forget the details or the whole thing.

The program I always use when I finally have time for the digital part is Clip Studio Paint and I try to bring my moleskine with me everywhere, but as I said, sometimes Ideas pop up in unexpected places.