> but by the time she's doing that i have to tell her off
The telling off, if you have got annoyed, will only excite her, and she will continue. Ignore things you don't want, praise the things you do want. In all fairness, if she has grasped all those commands in
only a week! I would think that training sessions are far too long. Play sessions should be far, far longer than training, and she is only a baby.
Do you not think that you are expecting too much, too soon? Instead of telling her off for getting over excited, put her in time out for a short time. Then, when you have calmed down enough not to give her a telling off,
calmly bring her out in a matter of fact manner.
She has only been with you for a week, and I am sure that training classes will help you realise that her behaviour is absolutely normal. It will all be clear when you meet other folk at class, with worries like your own.