Meaning of "Please, be done!" and "Way to go!"

Hello everybody and nice to meet you!
My name’s Astrid and I wish you gave me an explanation about the meaning of these two expressions: “Please, be done!” and “Way to go!”.
Thank you in advance (and sorry for my bad english)!

Hello Astrid, and welcome to

“Please, be done!” – This does not sound colloquial to me, but may be so in other Englishes. I presume it means ‘Please stop!’

“Way to go!”– This means ‘Well done!’ Often it used used sarcastically.

Thank you very much for answering me Mister Micawber, you made it clearer to me!