Design an interactive user training portal for [Software] that provides a self-paced learning experience. The portal should offer a range of content types, including video tutorials, interactive quizzes, troubleshooting guides, and downloadable PDFs. It should allow users to track their progress, complete assignments, and ask questions in real-time. The portal should also include an analytics dashboard for administrators to track user engagement and progress. The final portal should be hosted on a secure web platform.