Hay kat! Welcome to our little orchid world
That mix you have it in, is fairly typical for around here - blend of what looks like peat & bark. If you had some more expereince you might just grow very well with this. Watering a mix like thiis is by the teaspoon, LOL! It can hold onto water better then sphagnum moss.
I also think you best to do away with it all - check out your local hardware store, or perhaps a family chain store , garden center ... something of that nature.
You should be able to pick up a few items there, Look for
Schultz orchid mix Its a 9 litre bag. It doesn't have the best kind of bark, but works very well for me, a nice mix.
You should be able to find fertilizers too, look for : Miracle grow all purpose plant food. Even numbers on the bottle 8-7-6.
It's nice to be able to shop locally it'll save you money - you don't have tons of orchids, but that 9 liter bag with do a few pots for sure.
HTH