Have you written up a book proposal yet? That would be something to work on since agents don’t have time to read entire manuscripts. Publishers typically want to see three chapters or so, an outline of remaining chapters, and a marketing plan.
FWIW, over 50% of all sales last year were on-line as opposed to typical stick-brick stores. You might check out that marketing and sales
The book is actually finished. The problem is trying to find a non-leftie agent since most serious publishers will not consider submissions that are not agented.