How can I do multiple animations on my character such as Start jump, jump and a landing after the jump 2D

So I'm doing a project for the school by creating a 2D game. So far I have a test world, character and a few animations. My question now is like me. can do that when i press spacebar the character starts to jump and when he lands another animation wiealt text a landing. Or whom I eg Press D and the character to the right starts to run, that he first runs slowly and slowly and only then does the animation for the race come? In the picture you see eg I want to do it so when you jump you jump normally but at the height of the jump the character should do something different and when he lands something else.

I am very new to the world of Unity, so if possible not very complicated stuff, but in an emergency I would understand that. :)

I hope someone can help me.

Sincerely, Marlin Tanner