To start downloading apps on your Insignia TV, you'll need to make sure it's connected to the internet. Once you're online, navigate to the Smart TV menu and select the "App Store" option - it's usually marked with a shopping bag icon. From there, you can browse through the available apps and find the ones you want to download.
The app store on Insignia TVs is pretty user-friendly, with categories like "Entertainment" and "Games" to help you find what you're looking for. You can also search for specific apps using the on-screen keyboard or voice search, if your TV supports it. As you browse, you'll notice that some apps are free to download, while others require a subscription or one-time payment.