Design a Website Mockup

Hi, I have built a website through vista print and currently have it frozen. im wanting to change and add a few things but vistaprint dont have the plugins i require and ask for a HTML code???. i am wanting to create a membership website. where i upload videos of pilates classes/sessions and members can purchase to view online via a monthly or weekly membership setup. i need all the ecommerce options to sell ebooks and products and also need to know how to design a ebook 3d cover without have to pay monthly fees and purchasing every little option. i like using vistaprint as its user friendly and i can change things as i need when i need without paying someone to do it for me in 2 days time or everytime i change my mind. i am open to learning how to set up a new website that i can manage... eg. wordpress or something user friendly. i have a domain name already. i dont really know the best website builder or what plugins to use ...etc. but happy to learn so i can manage it myself. examples of websites i would like to mimic are .... [login to view URL] [login to view URL] [login to view URL] i already have a logo. i have all content for website. i have most pictures... im still working on pilates videos to up load. im sure how to blog but heard its good for business. im starting from scratch and thought id give the online pilates studio it a [login to view URL] to know about landing pages, getting people to see my website... i have facebook page... probably need to work on that too to get more 'likes" and more business to drive to website. can only work on this project between 12.30pm and 9.00pm Australian time. thank you.