After dying on my singleplayer world, i realized im unable to move, and i immediately see myself inside my own player character, so i could see the inside of my body.

using /kill does nothing, as well.

The image shows my avatar, after i used /tp to move to an angle where i could see it, since i couldn't move through normal means.

Next, i used setblock ~ ~ ~ glowstone, and where it is shown is where it was placed.

When i left click, my avatar punches.

Currently, i can only use tp to move, and place or break blocks near my invisible body.