Hi Ben and welcome to COL
You can start letting your puppy in the garden to do her business and to familiarise herself with it now.
After her final jab you will be able to take her out about a week later (some vets say 5 days after the jab but some can say up to 2 weeks :-).
She is still rather young at the moment but in a couple of weeks it would be a good idea to take her out in your arms to get her used to all whats going on around her in everyday life...hopefully she won't be quite so daunted when it is time to walk her
Do not put her down at this stage though