Making Apple Crisp Cheesecake can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 325°F (160°C). Grease a 9-inch springform pan.

2. Prepare Crust: In a bowl, combine graham cracker crumbs, sugar, and melted butter. Mix until well combined. Press the mixture into the bottom of the prepared pan. Bake for 10 minutes, then remove and allow to cool.

3. Make Cheesecake Filling: In a large mixing bowl, beat the softened cream cheese and sugar until smooth. Add in the vanilla extract, eggs, sour cream, and cinnamon. Beat until well combined, ensuring there are no lumps.

4. Prepare Apples: In another bowl, toss the diced apples with brown sugar, cinnamon, and lemon juice. Set aside.

5. Layer Cheesecake and Apples: Pour the cheesecake filling over the cooled crust. Gently spoon the apple mixture over the top of the cheesecake layer.

6. Prepare Crisp Topping: In a separate bowl, mix together oats, flour, brown sugar, cinnamon, and melted butter. Stir until crumbly. Sprinkle this mixture over the apples.

7. Bake: Place the springform pan in the oven and bake for 45-50 minutes, or until the center is set and the topping is golden brown.

8. Cool: Once baked, remove the cheesecake from the oven and let it cool on a wire rack for at least 2 hours.

9. Chill: For best results, refrigerate the cheesecake for several hours or overnight before serving.

10. Release from Pan: Carefully run a knife around the edge of the springform pan and gently release the sides.