Before you can use Creaticles, you must first set up your MetaMask wallet. If you need help setting that up, please visit this article.
Currently, Creaticles is in testnet. You must first configure MetaMask on Ropsten Test Network. If you need help with that, you can visit this article.
Creaticles is designed to be as simple as possible for both requesters and artists. In order to interact as either party, one should be familiar and comfortable with making transactions on the blockchain; after all, NFTs are generated on and secured by the blockchain.