Hi a very warm welcome to the site. The unit criteria is similar across the UK so it's hopeful you'd find information on here to help :)
To prepare I'd suggest you talk to your setting/placement about the qualification and how they support colleagues eg. with a
handbook, copies of policies and procedures, details of initiatives, campaigns, phonic and numeracy programmes in use and a list of your professional duties, role & responsibilities, job contract.
I'm sure Scottish members will add on with a hello & advice where they can :)
Best wishes with your study and look forward to hearing how you get on. Please post whenever you need to xx