Everyone I've seen that's worked with cork says it's really easy to sew. I'm not a big fan of Pinterest because I never can seem to find instructions for things I'm looking for & then get lost in looking for things that I didn't expect to see & then find that hours have gone by.
However, here are some ideas that might help you. Also, the second link shows some really cool earrings! Be sure & show us what you decide to make.
https://www.pinterest.com/jamagman/c...ric-use-ideas/
https://www.pinterest.com/pin/263179171960274764/