Hey Brijeshwar.

HPNLU, Shimla is a National Law University and all the national law universities in India come under CLAT. These NLUs provide ONLY 5 year integrated law degrees which combine and undergrad degree with Law like BA+LLb, BCOM+LLB etc. These are suitable for people wishing to pursue law after class 12th directly.

As you have already done graduation the suitable  law degree for you is a 3 year LLB degree. It is NOT offered by any NLU or HPNLU, Shimla. For it you can go for other colleges like from Himachal Pradesh University (HPU) , Shimla, Delhi University, Panjab University, Symbiosis etc.

Best of luck