The OSF website requires you to sign-up/sign-in. There are many ways to do so, including creating a new OSF account, by using or linking to an ORCID password, through social media accounts, or through one of approximately 47 partner institutions you may belong to. The registration process is simple and includes reCAPTCHA security measures throughout.
Once signed in, there is a very clean and clear dashboard layout that provides three main options to begin. You may search for projects, create a new projects, or choose from a list of your existing projects.
Once a project template is created, it is easy to work within. Files can added using either an upload or drag and drop option. Information and help features are found throughout. The template is uncluttered and easy to naviage. The buttons and menus are easy to find, and the layout, text fonts and sizes, colors, and banners are consistent. All features appear to be in working order. The site appears simple but is quite robust, providing opportunities to add contibutors to your work, choose licensing options, sync your projects to external services such as OneDrive, and automatically create citations in numerous formats (including APA, Chicago, and MLA).
Guides might be useful to introduce early college level researcher to the process.