Tissue culture orchid gift - help!

[Tyrosine]

Hello! Been given a tiny orchid seedling in a tube, wonder what i should do now. Can I leave it growing in the tube, or should I take it out and pot it?

A part of the plant is submerged under the gel, starting to see brown/black patches so not sure if this is rot.

The paperwork that came with it says it's an oncidium, no further info other than that.

I've attached some pictures, hopefully they are clear enough for someone here to guide me along! I'm a keen gardener but have never grown orchids, and I don't want to kil this!

Thanks!