Beginner fertiliser question

[Ryarsh]

Hello, I'm new to the forum and new to orchids in general.

I bought a mini phalaenopsis orchid yesterday, amongst other things. I've been doing my research since.

I use naruko fertiliser with all of my other plants, its a 5:5:5 slow release organic fertiliser. I'm curious if I leave some of the naruko in some rain water for a week until it dissolves, can I then use that to fertilise my orchid? Is 5:5:5 an ok ratio for an orchid, and if it is okay, how much should I disssolve?

Also, if anyone knows what species this is, that would be nice to know.
https://i.imgur.com/tOuO4vr.jpg
It's a deep peach colour, sorry for the bad photo.

Thanks