No-Bake Oreo Cheesecake (Glutin Free)

I had tried so many times to make a no-bake cheesecake, and I also failed so many times.
My cheesecake doesn't set, the texture is just like a thick cream.
I keep searching for the demonstration of making it, and I finally found on Allrecipes channel.
I substituted the cream cracker base to the Oreo base.
In this recipe, I mix the Oreo cookies with some cream crackers.
It is because I don't like it too sweet.
And then for the topping, I just simply put some Oreo cookies on top.
It is totally up to you and what you like.

Here is the ingredients you need, and just follow the methods......

Ingredients:
For the base:
35g Oreo Cookies (whole cookie with cream filling)
30g Cream Crackers
30g Packed Brown Sugar
1/4 tsp Ground Cinnamon
50g Butter, melted
For the filling:
250g (1 package) Cream Cheese (I'm using Philadelphia)
5ml Lemon Juice / 1tsp Vanilla Extract (optional)
235ml (1 cup) Heavy Whipping Cream, room temperature
30g Castor Sugar
30g Oreo Cookies (whole cookie with cream filling), crash
For the topping:
4 pieces of Oreo Cookies (separated and remove the cream filling)

Methods:
For the base:
1. Put the cookies and crackers inside a ziploc bag, punch it with a rolling pin until its becomes crumb. If you have a food processor, you may just work with it.
2. In a small bowl, stir together the cookie crumbs, brown sugar and cinnamon.Add melted butter and mix well. It will become like a wet sand.
3. Press the wet crumbs into the bottom of an 8 inch springform pan evenly with hands, to make it more pack, you may use a glass to help. Chill in refrigerator until firm, around 30 minutes.
For the filling:
1. In a mixing bowl, beat the cream cheese and lemon juice/vanilla extract together until soft.
2. Add whipping cream and beat with an electric mixer until the batter becomes thick.
3. Add the sugar and continue to beat until STIFF.
4. Finally add the Oreo crumbs, combine with spatula or wooden spoon slowly.
5. Pour the mixture into the chilled base, and top with the Oreo cookies.
6. Chill it at least 4 hours. For best result, chill it overnight.