Creating a delicious Creamy Italian Cheesecake is easy if you follow these steps:

1. Preheat the Oven: Begin by preheating your oven to 325°F (160°C).
2. Prepare the Crust: In a mixing bowl, combine graham cracker crumbs and melted butter. Mix until well blended and crumbly. Press the mixture into the bottom of a 9-inch springform pan.
3. Create the Filling: In a large mixing bowl, beat the softened cream cheese and mascarpone cheese with a mixer until smooth.
4. Add Sugar: Gradually add the granulated sugar, continuing to mix until fully combined.
5. Incorporate Eggs: Add eggs, one at a time, mixing on low speed after each addition. Make sure not to overmix.
6. Mix in Other Ingredients: Add in sour cream, vanilla extract, lemon zest, lemon juice, and salt. Blend until the mixture is smooth and creamy.
7. Fill the Pan: Pour the creamy filling into the prepared crust, smoothing the top with a spatula.
8. Bake: Place the springform pan in the preheated oven and bake for about 60 minutes, or until the cheesecake is set but slightly wobbly in the center.
9. Cool: Once done, turn off the oven and leave the cheesecake inside for an additional hour. This helps avoid cracking.
10. Refrigerate: Remove the cheesecake from the oven and cool completely at room temperature. Then, refrigerate for at least 4 hours or overnight for the best flavor.

Following these instructions will guide you expertly through the process of making this incredible cheesecake.