a supporting deck creation idea
Best of luck in the continuing work on your deck! I wish you well.
________
I personally think you're worrying too much about its finished appearance though!! It strikes me that you're getting all tense and anxious about what it'll be like when it's complete, even before you begin, and I think I know from experience what that attitude will get you: dissatisfaction. Anything less or anything different than the perfection you envisioned will be painful to you, I'd guess.
Here's my suggestion: keep a special sketchbook for your Tarot ideas. In it, place whatever helps you toward that cherished goal of the finished deck: your drawings of course, plus whatever notes to yourself you want to include, maybe some collage or paint colors. You never know when the angels of Tarot inspiration will whisper quietly behind your ear, hoping you will hear and understand, and if you're ready with your book to 'take dictation', as it were, you can retain the ideas for the times when you're ready to sit and work them into physical form.