you have to use the web portal and use your steemit credentials through steemconnect. here is the link. No worries this one is super legit https://join.utopian.io/ there are some rules you have to follow though but they have guides and moderators that can help you the proper way of posting it in the condenser (utopian.io). Anway good luck sir and I hope you enjoy your stay here in steemit. If you need help with anything about this platform i'd be happy to help if I can :) cheers!