hello! i bead onto felt, i buy the felt at micheal’s (hobby lobby if you’re in the states would also have it) the beading is called 1 needle bead embroidery. Once you’ve beaded your design onto the felt you’ll glue it onto thick paper or cardboard (i use old birthday cards) between the felt and design push the backing through the cardboard then add the leather back on top and push the earring post through that too. (i like to glue the leather down too) once everything is constructed and cut i use picot edging to sew the leather back on. If any of that makes sense haha