How to select DC-DC converter topology?
I recommend picking a topology, and running down the design path enough to get a feel for if you can meet your requirements.

If you can't, and can't see a way to easily fix it, move on to the next topology and repeat.

If you run out of topologies, edit your question to reflect the work you've done, where you're having trouble meeting the requirement, and how we can help.

Without sarcasm, the process seems central to your thesis.  If it weren't, you'd be buying a converter.