The best way to get better at Figma is just to spend more time making mockups of screens.
Today, try your best to recreate one of the three following mockups. While you’re recreating the mockup, be sure to make it your own - add your own colors, fonts, images, icons, etc.
Keep in mind, it doesn't have to be perfect! This is your second day using Figma - you'll get better over time.