After you have answered the what, why, who, when, and how questions, you are ready to draft policies and procedures for your new journal. These key documents include:
About Statement (a.k.a., Aims and Scope)
Author Submission Guidelines
Author Agreement
Copyright and Open Access Policy
Peer Review Policy
Peer Review Guidelines (i.e., standard questions for reviewers)
These free, online resources, produced by trustworthy, nonprofit organizations, will walk you through drafting these documents.
The Digital Publishing Workshop: Journal Editorial Workbook, Columbia University Libraries (nonprofit)
This workbook covers the basics of drafting the key documents and provides examples.
Open Access Journals Toolkit, Directory of Open Access Journals and Open Access Scholarly Publishing Association (nonprofit)
This toolkit provides in-depth guidance for every aspect of starting and managing a journal.