Once your creator profile is complete and your social profiles are linked, you can start making collaboration proposals.
Go to Marketplace.
Select a preferred campaign offer.
Click on the "Make collaboration proposal" button.
Fill the the promotional content that you are willing to create for the campaign.
Submit.
Note that when submitting a content proposal, it is crucial to consider your social networks, ensuring they meet the minimum accepted follower count of 1000. Proposals with a follower count below this threshold will not be sent.