Cutie or what, I wish you lots of love & hours of fun with her. As Little Robyn says treat her as a baby & really love her.

More practically, once she's had her 12 weeks jabs, take her to a puppy training class, then onto an adult class.

Flyball is fantastic fun for collies once they are fully grown & trained, it really gives them lots of fun & exercise: UK flyball

For the moment though make sure that you take her out regularly to relieve herself. If she gets it right & pees or poohs while outside, give her lots of praise. She may look at you like an idiot at first, but eventually she'll realise why she's so clever. It's also an idea to take out any soiled newspaper that she has used & put it in a certain spot in the garden, she may get the message that way as well.
Meanwhile make sure, even from tiny puppy stage that she knows you are the boss. Try gently training her to sit, giving her a little food when she gets it right. I also have always made sure that I get my dogs used to being touched while they are eating, start this as a puppy & she will never go for anyone who just accidentally brushes past her as an adult when she is feeding. Some dogs grow into bad habits. Also pick up her bowl while she is eating, this shows you are her boss & helps training later on.

Have lots of fun with her