In casual dating, the main focus is on enjoying the company of each other with no long-term commitments, whereas serious dating involves a deeper emotional connection and potential for a committed relationship. On Reddit, it would be helpful to join subreddits related to dating advice to gain insights on navigating both types of relationships, understanding the differences, and seeking advice on how to approach each type of dating scenario effectively. Additionally, engaging in discussions and sharing personal experiences can provide valuable perspectives on casual and serious dating dynamics.