@akdas_akdas No worries,
No automatic payment. The LR team wants to allow people to try out the full pro features.
The Pro user experience you have now will disappear in 14 days, and you will not be charged. They also have no way of pulling your payment details unless you manually put them in and upgrade to Pro after your 14 days are up.
You don’t need to do anything with the free pro trial period you have right now, but I recommend taking full advantage of it since it’s pretty neat.