To create a duet, find a video you want to duet with, tap the 'share' button, and select 'Duet.' This will open the camera, allowing you to film your side of the duet alongside the original video.

To go live, you need to have at least 1,000 followers. Tap the '+' icon, select 'Live' from the options, add a title, and then tap 'Go Live' to start streaming to your followers.

When filming, tap on the 'Effects' button on the left side of the screen. Browse through the available effects and filters, and apply them before or during your recording for a unique touch.

To create a trend, you can start by designing a unique challenge or concept. Steps to do so include: 1. Record your original video with a catchy hook. 2. Use appropriate hashtags to reach wider audiences. 3. Encourage others to participate by tagging friends.

To monetize, you can join the TikTok Creator Fund, promote products, or partner with brands. Steps include: 1. Build a dedicated follower base. 2. Meet TikTok's eligibility criteria. 3. Apply for the Creator Fund via the app settings.