Easy (Indoors) Growing Orchids

[Graham]

What actually defines an orchid that's "Easy to grow"?

You see, I've borrowed a book from our local library and it's got over 1000 different orchids, but I've got no way of telling which orchid would be an easy one for a beginner to start with...

As my space is limited, I want to focus on 'indoor' varieties.

As a beginner, all I've got to go on is what the plant looks like in flower.

Is there a select number of species that could be considered easy-growing, with the rest being for more 'intermediate-level' growers?

Also, what defines an orchid that's hard to grow? what is it that makes it such a challenge?

________
Graham.