Can you help me with some very basic puppy training commands?

I’ve got a beautiful puppy named Blue. She’s actually brown with blue eyes and she’s a Chihuahua, Maltese/Poodle Mix.

She’s in about her 10/11th week.

Questions:

1. How do I potty train her correctly? (so far I’ve let a crack in the back door for her to go out whenever but I think she’s still going in the house)
2. How to teach sit?
3. How to teach paw?
4. How to teach come here? (I really need this one on command)
5. I’ll ask advice for rolling over.
6. What dog tricks or commands do you recommend she learn now?

Thanks so much.