Thanks for all those who have supported me on this topic...
I actually solved this issue by a small trick!
I installed steam
created an account
clicked add a non-steam game and added both GTA5.exe and RagePluginHook.exe
Now I click PLAY in GTA V
Immediately when I clicked PLAY in GTA V, I switched to Rage Plugin Hook which I added and clicked play in it too.
This was the method which worked for me!!...
Once again, Thank You So Much @Charlie686 and @WithLithum for sharing me your opinions...
KKGAMER9952's post in (GTA V) Rage Plugin Hook Stuck on Loading Game was marked as the answer