[ARandomerDude]

Even easier: get a hypercardoid shotgun mic and speak directly into the front of it. I’ve had amazing success with the Azden SGM-250H in very poor recording environments (bare walls, tile floors, etc).

No affiliation, and I suspect numerous other similar mics would do well.

[kortex]

A hypercardioid and any manner of soft surface behind the speaker - even pillows or curtains - will get you >90% of the way there for most podcast purposes.

Really, after just fitting out a (very shoestring budget) recording studio, the first thing is reducing flutter echo by covering most hard flat parallel surfaces. That alone is like, worth double digit percent of the solution.