To start using Corkboard you need to head over to its main page. Click on " create one now" button and you will be directed to the platform where to store your notes. Once there just click on any empty space and a small box will pop up where you can start filling it with your data. You can also use images by pasting their URLs there. There is an editing bar above the box that you can use to select the colour and do some editing to your notes.
This service is free but there is also a premium version with $4.99 a month which has far more features than the free one. It can for instance allow users to have up to five boards each with custom settings and password protection and many more. Anyway for us the free version is enough.
When you finsih writing your notes you can use the generated URL to shafre them with your friends or simply bookmark the page for you to access later on.
Watch this video tutorial to learn more.