To gain confidence in your topic, read widely. Consider choosing a new title to skim regularly, and watch for new and recurring concerns, suggested strategies and perspectives, and outstanding thinkers. You don't need to read as closely as you would for course readings and textbooks, so take some pressure off yourself! Pick only the books and articles that catch your interest, and settle in somewhere cosy where you won't be disturbed.
Time spent reading is an investment in yourself that will pay dividends in the future.