I apologize that no one has responded to your question sooner. Different experts come online at various times. I just came online and saw your question. My name is XXXXX XXXXX I'm a biologist with many years of gardening experience. I would like to help you tonight.
There are different varieties of orchids, and some aspects of care are different for the various types. If yours has a label, let me know what it says, and I may be able to give you more specifics. However, there are some aspects of care that are general for all of them. Orchids don't bloom continually. A bloom period is followed by a growth period, so don't expect continuous blooming.
Water about every 7 to 10 days. Try not to get water on the leaves, and if you do, dry them gently. When you water, water deeply. Let the water run through the pot and drain out the bottom. Leave the pot in a sink to drain. An hour or so later, repeat the soaking.
Orchids do best with a weak solution of fertilizer applied often (weekly), rather than astronger one applied less often. Too much nitrogen leads to lush leaf growth, but few blossoms. You can buy special orchid fertilizers in many garden centers, or, here is an online supplier:http://www.repotme.com/orchid-fertilizer/Orchid-Fertilizer-FAQ.html
As for light, orchids do best in filtered light. South windows are usually too bright. You can tell if an orchid is getting the right amount of light by the leaves.You want them to be bright green. If the leaves are very dark green and lush, that can mean too little light. If they look faded and somewhat yellow, that is a sign of too much light.
There are many good sites for orchid growing that don't require memberships or payment. Many of them do wnat to sell you plants or supplies, but you can ignore that. the information they give is still good. Here are two:http://www.orchidsusa.com/1Introduction.htmhttp://www.repotme.com/orchid-care/
The American Orchid Society has a section on care that you can access without joining under their 'All About Orchids' tab:https://www.aos.org/default.aspx?id=1
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