Hi Arim!

Yes, you can join! The National Security Gaurd (NSG) has 2 parts such as Special Rangers Group (SRG) and Special Action Group (SAG). SRG gives protection to VVIP and even the Prime Minister. It is Paramilitary Forces and Police. SAG is for National Security like the Indian Army! So, you'll have chance in it!

Hope this is helpful!

All the best!