Since you're sensation-based, pErhaps there is some object, for instance, that when you touch it, feels "magical" to you, or seems to support magical energy in your body. I would try to find such an object, and consecrate it and dedicate it to this purpose only, so that your learned physical experience gets "linked" with the object and its sensations or textures, as something that supports your magical work. YOu might spend a day or a week going about the house and yard or other places, trying to direct your hands and body to "feel" and find such an object.
OF course, you do take in the world through your eyes, and even if you aren't good at inner visualization, you may find that there are some objects that when you look at them with your mundane eyes, do also support a magical feeling. PErhaps a picture of someone or something, or some natural object.
Those are also really good ideas. You're definitely right; I need something special that I can associate with magic that is portable (and so I'll be able to take it to France with me this year). And while I don't find visualization very useful, there are images that inspire magical feelings for me, so I'll try to collect more of those. Thank you!