To open Gmail, open a NEW TAB, then to the LEFT of the MIGHTY WAFFLE you will see the word Gmail, Click it to open.
You can also open Gmail from the MIGHTY WAFFLE.
1) On the left of your screen, you will see a button with a pencil and the word COMPOSE. Click it. Compose means to write or create.
Then, follow the steps in the image below to compose and send your email.