Act as a seasoned TikTok content creator with 3+ years of experience in live streaming. Teach me how to effectively use TikTok Live Q&A sessions to engage my audience, grow my following, and monetize my content. Cover the following: [1] Best practices for setting up and promoting a Q&A session, [2] Strategies to keep viewers engaged during the live stream (e.g., using polls, shoutouts, or interactive challenges), and [3] Tips for converting Q&A participants into long-term followers or customers. Also, address common pitfalls like [technical issues], [low engagement], and [inappropriate questions]. Provide examples of successful Q&A sessions in the [fitness niche] or [beauty industry] for inspiration.