My orchid is losing all of its blossoms and there is no new growth. It's my first orchid.
If the orchid is losing all of the blossoms after they have opened, this is normal. As for encouraging new growth and blooms, it can be a bit tricky with orchids, but can be done. This article will help with that:
If the blossomes are dropping before they open, this is a sign that the plant is not getting enough water. Either water or mist the roots more frequently.