In Order to Mint to the Rarible|Testnet under you will need some testnet ETH token. Make sure you have installed Metamask extension.
Step 2: Start uploading your NFT
Enter the Name of Your Token, then a short description, finally choose your file you want to upload to Rarible|Testnet and click Submit
Step 3: You will see your nft link on rarible … click it!
Once you click the link, you can share your NFT via several social media sites especially SFUN.