Must you limit how many quirks a character has in a story? And is it a bad idea to do a story in 1st person if the main character has many

I've known some quirky people... The number doesn't matter, it is the way they are presented. You really want a character, especially the narrative character, to be well rounded and more than just a collection of affectations.

You're thinking too much. Just write

reveal what is necessary to the story.. remember, the reader of the story doesn't want to get lost with too many unimportant things.

It depends how well you can write it.

And if the quirks really add depth it helps too, rather than just putting them on there for the sake of having them.

It depends on the story you're telling, and how reliably you want your narrator to be