Step One is showing interest in joining the Patriots. Richard Sherman (and others) checked that box last week.
Step Two is leaving your current situation. And it appears that's going to happen, as well:
So the question now is: Will there be a Step Three? Will the Patriots -- presumably in search of cornerbacks with the expected departure of Malcolm Butler and the less-than-stellar performances of Butler's stand-ins during their Super Bowl loss to the Eagles -- take a flyer on Sherman, the Seahawks' long-time All-Pro corner? If Seattle actually lets him go, that is?
Stay tuned.