There are some things you can do to help your Facebook Ad Sets exit the Learning Phase and start performing the best they can.
One of these is to target a wider audience within your Ad Set. For example, if you have age range as a factor in your targeting, splitting the ages into too many Ad Sets may hinder their chances of achieving the 50 goals in 7 days. (Each Ad Set will need to achieve this to exit the Learning Phase).
Another tactic would be to change the goal. It’s far easier to achieve 50 landing page views in a week than it is to achieve 50 conversions – especially if your budget is not all that high.
The downside with that approach, of course, is landing page views do not guarantee pre-screener form fills, so Facebook may send a lot of traffic, but not generate all that many referrals.