You click the emerald, it should say shop if you highlight it, then there will be a Bunch of different ranked kits, ranked higher is more expensive and lower is cheaper. I hope this cleared things up
Hello! I hope you’re enjoying the Sandlot so far. Floofy is right! But I also wanted to mention that the way you pay for these kits is by being on the winning team in a skywars game. To know how many coins you have, when you are in the Skywars spawn look to the right of your screen. You should see your stats, one of those being “coins”.
There's a chest in your inventory during the intermission (when you are in a cage before the big game of losing). (right) Click on it!