Wordpress replace current theme - with new

General information for the website: blog / publishing
Description of requirements/features: current site: http://raisinghappy.com.au/

we need to install and setup new theme and setup sections as below.

http://raisinghappy.com.au/new/ ( wp theme i will provide )


Home
Our Story
Lifestyle- separate links to mind, body, food, fashion.
Children
Events> workshops
Get Involved
Contact

standard Social Media plugins to register users / share content
event calender plugin


Content:
workshop pages under current sute - they will go under Events>Workshop in new site.
1 article post for each section, rest i will do... would need a basic screenshot based guide from ur side on how to's for most common stuff for managing my site.
Extra notes: