For me, there were many hurdles. At first for the life of me I couldn't figure out how do I get to the Outpost. I asked on Discord but the questions were flying up so fast that they weren't being answered. After poking around a little longer, I found out how. To get to the Outpost, you need to switch your Metamask to the Avalanche C-Chain. After that, connect to game.defikingdoms.com and you will be greeted by Snow Sage Ellia.
Click on her name and click Get Started, then there will be options to bridge AVAX or Jewel.
If you chose to bridge Jewel and you have Jewel in your Metamask wallet but not showing up on the bridge as above, make sure you select multiJEWEL from the second dropdown on the From section. See the screenshot below.
Now you need to click Approve Bridge. This is for Approving JEWEL spend limit. After you confirm in Metamask, the Approve Bridge button is still there and you will need to click it again. This time is for approving the Contract Interaction.
After that, your Jewel will have disappeared from your Metamask Avalanche and depending on the backlog, should arrive at the DFK Chain in a few minutes to a few hours.
Crystalvale is only available at beta.defikingdoms.com.
Hope this helps.