You will use a Google Sheet for your character sheet until Hex is implemented into a virtual tabletop (Foundry, most likely).

The sheet can be found here:

https://docs.google.com/spreadsheets/d/1mZPDL-oD0v-9Rwy5loNIEfqroSId6o7fOLyb9sQPAog/edit?usp=sharing

Make sure you go up to File > Make a copy. Then go to your copy, fill it out, and then click the blue "Share" icon. A window will pop up, and below "General access", change "Restricted" to "Anyone with the link". Once done, click "Copy link" to get the link saved to your system's clipboard, and then paste it in your character thread in Discord.