To create a new idea simply go to https://mxideas.ideas.aha.io/ideas/new and choose a product.
Next, enter a simple title, a detailed description and a category (if applicable).
Click "Share idea" and you are done.
To see the idea in Aha, click View in Aha.
When you create an idea you will automatically become a watcher. You will be notified when the idea is edited.