Alienware 15 R2 - BIOS Option

Hello Everyone, Good Morning!

I'm having so much difficulty to get in the BIOS while my Laptop is turning on;

I found in Dell instruction that we must hit F2 button multiple times and after Alienware Logo the BIOS should appears, but it's not happening in my case and it goes directly to the Windows Password Screen.

I need to get in the BIOS because I need to change the Boot option from my HD to my new SSD.

My specs are below:

Alienware 15 R2

Intel Core i7 6Gen

16 GB DDR4

HD 1 TB  and 512 GB SSD Nvme

GTX 970M

Thank you in advance for your help!