You can sign up on DeepSource Cloud here and connect your VCS provider workspace (GitHub, GitLab, or Bitbucket) to DeepSource. Then you can enable DeepSource analysis on one of your repositories from the dashboard and invite your team members.
Once DeepSource is active on your repository, you can see the baseline report of issues on the repository’s dashboard on DeepSource. Every new pull request will be analyzed by DeepSource as well.