First you have to install Office 365, but before you can install Office 365 and have access to all the applications that compose it you have to create a personal account on the Microsoft website.
It all starts from the web software.uv.es, clicking on the link "Microsoft Office 365" (the username Microsoft.com, will be from that moment our login to access Office 365 and its services i. e. OneDrive).
When you enter the Teams platform, the following pop-up window will appear:
From here you can download the Teams desktop application. If this pop-up window does not appear, you can download the application by clicking on the "Download desktop application" button at the bottom of the left sidebar.
After clicking on this option, the desktop application will be downloaded and installed.
PLEASE REMEMBER...
You can also start an online meeting without downloading the desktop application after validating your Office365 account at :
teams.microsoft.com