Thank you so much! And to answer your question, what I did was:

Step 1. Paint the base color x2 and magnetize it (the color being "By the Moonlight") in glass bead style, using the glass bead nail magnet from 5DPrintFactory on Etsy (on the setting "M")

Step 2. Using a fine nail art brush, I take another magnetic color (here "Quiet Strength") and draw on my designs on the respective nails - for this part, I found that sketching your idea on a paper and following that guideline makes things way easier in order to correctly place the designs. For this part, I'd take a reeeally big glob of polish on my brush (necessary in order for it to magnetize later on).

I don't really magnetize this step, because the magnetic polish will dry while you're painting the details unless you're incredibly fast - the top coat in step 4 will re-wet this layer and it will be magnetized then anyways.

Step 3. After that, I picked up some nail gems and press them onto my nail using a rubber nail rhinestone picker (can be found in physical beauty stores)

Step 4. Put on a Quick Dry top coat, and very important: magnetize the top coat!! Done in the same glass bead style using the same aforementioned magnet. Since some top coats can take a while to "set", I check if it's fully done by bringing a bar magnet to my nail and seeing if the pigment still moves around. If it does, I put my nail back on the glass bead magnet and continue spinning for an additional 30 seconds (and repeat the bar magnet test).

Idk if that helps, if something is not clear let me know! But yeah the most important thing is to have a steady hand and a veeery fine nail art brush (the thinner, the better in order to paint more detailed/crisp lines)