Let me share my milestones as I turn them over on my walk through self-pubbing.
One of the first things a writer should do after finishing a manuscript is write a press release. If you research romantic novel press releases, you'll see some examples online.
You prepare this to prepare for your next step, which is contacting local newspapers and such. But I won't get into that, yet. First, write a press release. Too much information all at once will only stress you. Take this advice, then check back in at a later date for step two.