New here oncidium twinkle white shower, phals questions

[Katjo82]

This is my first post, My name is Tami. Today I went Franklin Park Conservatory and Botanical Gardens and had a great time. But I could not leave with out getting a Orchid. I had one before but didn't know much about it and found out most likely it died from root rot. SO when I walked away I ended up getting two. One is a phal, the other is oncidium twinkle white shower. I have a question about the Oncidium it has some brown tips on some of the leaves, do I need to do something for them? it looks like a few of them already got trimmed. hope I added the pics right. Let me know what you think. Thanks