Yup, one chin will do just fine on their own.
) And like greychins stated, you could always get two and try and intro after quarantine, and if they don't get along, just keep them separated. And I have mostly experience with males, but have owned 3 female chins (one currently, 2 in the past). All of my males, with one exception, have been extremely friendly and tolerant. Even the exception, my pink white male Charlie, isn't actually aggressive. He just hates it if you approach him, he HAS to approach you or he gets an attitude, lol.
Out of my females, all but one were really sweet. Lucy, my very first chin, was actually a lot like Charlie. It's not that she was actually mean, but she didn't like if you approached her and actually sprayed my cousin in the eye one time, lol. Apparently, it really hurts.
Daisy, another female that I had, was just as sweet as any of my other males. And Cherry, who is currently my only female, is very sweet, and my only lap chin! She does have her moody moments when she just doesn't want to be messed with, but other than that, lol, she's a lovely chin!
) So, in my experience, I truly thinks it depends on the individual chinchilla, regardless of gender.
Oh, and good luck on your chin hunt!
) Getting your first is so exciting!