You can find your custom fields on the project card on the right. But first, you need to set up the custom fields in settings, which we show in the video link below.
In Settings, go to Project Settings. In this section, click on Custom fields.
Then add the fields. First, choose the type of custom field (like value, currency, longer text, toggle...), and fill in the field name or specific values (if you choose the selection type field).
We explain the steps in detail in this video. The process is exactly the same as with contacts, you just create it in Project Settings.