I figured as much. I have sent twenty-thirty out just like you mentioned. Have gotten a few reviews back and hope the momentum continues to build.
In the mean time ... I'm still writing.
This is one of the advantages of self publishing. If you did swing a standard NY publishing contract, you would have no marketing besides what you are already doing on your own, and if the book did not sell from the shelves in 90 days it would be "remaindered", sent back, you'd eat it, and have the mark of doom put on you.
IOW, a NY publishing contract with its tiny advance and 10% royalties is a crap shoot where 90% lose totally. In self publishing, you give yourself time to build a head of steam one review at a time.