Bootstrap Theme ForestBoatstrap theme forest
... They can be reviewed here (Tuts+ Web Design Courses).
Have a look at the HTML and CSS category, they will help you a great deal. Lynda, who also offer great exercises, you can find their exercises here (web video courses and exercises from lynda.com). For ThemeForest, the most important thing to remember is how to create high-quality bootstrap topics (HTML, CSS and Js). Look for a book (if you want a book over a video).
When I say bootstrap theme, I suppose you're speaking about HTML template created with bootstrap.
When you seriously want to get into doing serious work, you should know much more than the fundamentals of webdesigns. Purchase a topseller's bootstrap theme from ThemeForest, view the theme's file, source, design, as well as other aspect. Rent or build your own custom HTML script and begin programming HTML/CSS for your own designs.
Boatstrap to Themeforest? Tree house Fellowship
Allow Bootstrap to be used to create a theme you want to market on Themeforest? Yes, it is, and there are many who use the Bootstrap-Framework to develop them. Only members with a valid account are permitted to posts in the forums. Please login in or register for the mail.