For the full and smooth work, you need to install the Flutter environment, which is a multi-paradigm programming environment, required for you to build your own LMS app.
First, download the Flutter SDK, the installation bundle to get the latest stable release of the Flutter SDK. Depending on the system you are using follow these links to get the installation file:
Once you downloaded the installation zip package, create a folder, and extract there the Flutter SDK. Use the desired location, extract the Flutter, and archive that folder.