Combine the graham cracker crumbs and sugar in a mixing bowl, then pour in the melted butter. Mix until the crumbs are evenly coated and resemble wet sand.
Press this crumb mixture firmly into the bottom of an 8-inch springform pan, using your fingers or the bottom of a glass to create an even, compact crust. Chill in the fridge while preparing the filling.
In a large bowl, beat the softened cream cheese with a sturdy whisk or spatula until smooth and creamy, scraping down the sides as needed.
Add the sugar and lemon juice to the cream cheese, and continue mixing until fully incorporated and the mixture is fluffy.
In a separate bowl, whip the heavy cream with vanilla extract until soft peaks form, listening for the gentle swish of the whisk as the cream thickens.
Gently fold the whipped cream into the cream cheese mixture, using a spatula to combine without deflating the airiness, until smooth and uniform.
Pour the filling over the chilled crust and spread evenly with a spatula, smoothing the top for a polished look.
Cover the pan loosely with plastic wrap and refrigerate for at least 4 hours, or preferably overnight, until the filling is firm and set.
Once chilled and set, release the sides of the springform pan, then slice and serve the cheesecake chilled, enjoying its creamy, velvety texture with a crisp crust.
