You've written your book and had it professionally edited, now how do you secure a literary agent.

How to get a literary agent after having your book professionally edited.

Since, you're able to self publish your own book relatively easy via Amazon Kindle, I'd suggest going that route. Should your ebook gain a certain (not publicly known) amount of sells Amazon and/or other publishers will contact you about a possible publishing deal. 

At that point you may secure a favorable deal the way Amanda Hocking did or decide you're earning so much revenue with creative freedom, you'll keep on self publishing your own ebooks and have enough funding to self publish your physical books if you decided.