After having a quick training session by ob1… Yes. Rey just decided she could use it by closing her eyes mid battle
Obi Wan merely awakened Luke’s ability of the Force while on the Falcon. Once that happened, Luke could use the Force in a more focused way and blew up the Death Star.
Rey touched Luke’s old saber and was awakened of the Force and Maz further explained what that awakening meant.
Also think to how both Rey and Luke had to quickly learn to simply be aware of their ability and how both wanted to not trust it at first. Luke wanted to use his targeting computer and you could see his hesitation when Obi Wan told him “use the Force”. When Maz told Rey to close her eyes and feel the Force, she didn’t because she didn’t want to believe it herself. It wasn’t until the right moment when things were dire that she decided to accept the Force for what it was, remembered back to what Maz said, and closed her eyes to take in the gravity that is the Force.