Brassia Rex Christine yellow/wilted pseudobulb

[corsea]

Hi all, I am a new user, also new to the world of orchids.

This is my first, my mother purchased it from a local orchid lovers' group. It was labelled "Brassia Rex Christine" and is supposedly easy to grow.

Well, I know I've given the poor thing too much sun (misinterpreted "bright light"), and the leaves are a bit sunburnt. However, I also noticed that my tallest pseudobulb (the stalk coming out of the "soil", I am using what it came in, looks like tiny stones) started to yellow and became wrinkled/shrivelled. The other stalk has started to yellow as well and I'm thinking it's been underwatered, possibly as a result of the oversunning since I was told only to water once a week by sitting it in a bowl of water for half an hour.

Any insight would be appreciated. I will see if I can post a picture if that would help.

Can it be saved? Is more water the answer?