Help me know my Chimby better

[Chimby the chick]

Hello,
I'd like to know what sex, age, or breed my new adopted chick is.
I found it 3 weeks ago and it was super small (so far we believe it is infact 3 weeks old) but don't know what breed or if it's a female or male chick. I only have one chick and I'm a first time chick mommy. My grandmother used to say that one way of knowing was to turn them around, and if it started kicking it was a boy vs. if it stayed calmbit would be a girl....well my chick would be a hybrid because it does both from time to time.

Here are some pictures for reference based on the rules provided. (I tried)

 

[swamphiker]

It's too early to tell on sex for this chick. Wait a few more weeks and there may start to be hints. I can't help you on the breed. Good on you for taking in this little cutie!

 

[Chimby the chick]

Okay
Then I shall keep documenting it's changes.

 

[nuthatched]

you know.....it's gonna need friends..... ',:] behold! chicken math!

 

[TheOddOneOut]

Too young, but tbh it looks like a BSL. If it is, it’s a pullet.
But nothing’s sure yet.