I’ve never made it, but there are several reliable resources with recipes. Some use sour cherries and some use sweet. If you end up making a batch, I would love to hear of your results.
https://www.epicurious.com/recipes/member/views/luxardo-maraschino-cherries-565000a338a4c0ce3d2c184f
https://www.foodnetwork.com/recipes/ted-allen/real-maraschino-cherries-recipe-2102576
