How to select one animsequence to play?

In market place, I bought animal pack. But there was no animation blueprint instance.
So I should make by self. As I am a beginner, I am not familliar of terms like blend, offset, etc…
How can I select one animation sequence to play in state machine?

For example , I have IdleBreathe and IdleLookAround. In the Idle State, I want to choose one of the two to play.
How can I make it?
Also, I must extend this work to other 29 animations, please give me advices. Thanks in advance.