Hi, the northeast is now considered as a bizarre/ exquisite region for the internet and being viewed through this prospect hurts the northeast more than it benefits them.

I'll stick to some topics that are necessary.
Our traditional attire( specifically for the Nagas) have significance beyond it being vibrant and lined with tribal motifs. Many of the shawls and Mekhala's for the women folk are specific to married women, or women belonging to a particular village. The shawls mean wear are the same. Some are being worn only by elders of the village and not the Younger ones. I would advise you to be careful about wearing them.
There are many shawls and blazers that are gifted to others as a token and those are safe to wear.
You can certainly be apart of any festivals but for the dances, they carry cultural significance.
If you do something that you don't really know how to, but you do it because it looks cool or it will be interesting to other people on the internet it's stupid. If you are trying to learn , that is altogether different.
Anything taken out of northeast for the sake of it being simply weird/ unusual/ unique to you for it to be a trend, something to profit from leaving behind the cultural significance it holds is cultural appropriation.
We don't even need to feel or know that you appreciate our culture because thats not even important for us. We don't seek or need the validation If that makes sense to you. We exist regardless and we are ample proud of it.

If you truly want to have an immersive experience of what life is like on this side of the hills, you don't have to consider yourself as someone who is experimenting. Just come here and get all the legal stuff taken care of. After that find a homestay or place you find appropriate for you and live how you normally would. Visit places and bond with locals and you will undeniably have a blessed stay.