The most important thing is to finish the book. There's absolutely nothing wrong with saying hey I know I want to tell a story but I don't know how to do it. Go to a writers conference. If you want to write a thriller international thriller writers in New York every summer, it's summer camp for thriller writers. You will meet every major name in the industry and they have a whole day session called Craft Fest where these luminaries teach classes on how to write. Do that. Now obviously if you can find if you join mystery writers of America or international thriller writers or our WA used to have romance writers of America used to have an absolute astounding new writer program.