Before you set up a Mif2Go DITA project, be clear about what level of familiarity with DITA you need, what you intend to do with the output, and what role you want Mif2Go to play in producing DITA output. Be aware that conversions to another source format, such as DITA XML, can be difficult, especially if you are converting an unstructured document. There are no shortcuts. You might need days or weeks to get it right, working with small test documents, before you can go into production.
You can see a Scriptorium Publishing webinar about the process, showing several alternatives:
Click View Event Recordings and choose Converting Unstructured FrameMaker to DITA; the Mif2Go part of the presentation starts at 33:15.
§15.1.1 Understanding what you need to know about DITA
§15.1.2 Clarifying your purpose for creating DITA output
§15.1.3 Converting from structured vs. unstructured FrameMaker
§15.1.4 Understanding what information you must supply
§15.1.5 Understanding how Mif2Go generates DITA output
§15.1.6 Creating valid DITA XML output