Please Help to Choose Places for 15 days itinerary (North WB & Sikkim)!

Hi Travellers,

I hope you all are fun somewhere travelling! Currently, I am planning to visit North West Bengal (Mirik, Darjeeling, Lamahatta, Kalimpong, Sillery Gaon) & Sikkim (Pelling, Yuksom, Ravangla, Gangtok) in May 2023.

I am not mostly into rush travel and I always seek a keen for knowing cultures & people's vibes around. That's why I am anxious about covering all those above mentioned 9 places in 15 days itinerary. It will jampacked with no sleep plan!

So, can you guys suggest...