Hello, Silvia. Looks like I am the first of many who will welcome you to the club! A new environment often causes orchids to get fussy like that. It is typical. I recommend that you check out the information on your orchid types and care tips at this link.
Orchids - River Valley Orchidworks - Care and Cultivation Guide
Your pictures didn't post. Maybe because they are greater than 700x700. A warning comes up in the pop-up box and I have missed it in the past too. This link may help. Go to BD's post #8 to learn how to resize your pictures
Orchids are not typical house plants and may not work well as an arrangement. Also, light is not bad, but the roots need air. To be more helpful, we look forward to seeing the pictures. Best regards, Joe