Yes
As long as you bought the NFT, you are it’s corresponding owner, indicated by the token. I highly recommend researching a bit about NFTs in general to have a better overall idea.
The benefits for shielding 3.0 are vast, much more than shielding 1.0 and 2.0. Although I don’t remember the full description. I actually have all 3 now.
The NFT works anyway, you can use it as a phone background, or pc screensaver, or print it out and laminate it, or nothing at all, it’ll still work. With intention and meditation you can connect with it more easily, if you want.
And yes, a picture can in many cases work even better than an audio, but it’s sometimes up to one’s individual experience. You can actually try to look at some NFTs, perhaps you will feel sth even when you haven’t bought them yet…