I recently went there myself and I realized for myself what I had to do there so that my trip was magnificent:
1. Get a Dose of Naga Culture at the Hornbill Festival
2. Observe Local Life at the Kohima Night Market
3. Trek to Japfu Peak
4. Feast on Authentic Naga Delicacies
5. Live in Tribal Huts
6. Tour the Naga Villages
Delhi is very risky at this time, However after Covid 19 gets over you can visit Shimla, Kasol on bike.
In Uttrakhand there is Lansdowne, Rishikesh, Mussoorie are all nearby to Delhi.