For first time users, click the "Create a bucket" link from the Buckets are live! notification at the top of your Yotta tickets homepage.
To manage your Buckets, tap on the Bank Icon at the bottom of the app (second from the left). From here you can create a new Bucket by tapping on "New" or manage your existing Buckets by tapping on "Manage".
Creating a new bucket allows you to choose from a variety of common, pre-set ideas, as well as the option to customize your bucket and icon to whatever you'd like. You have the ability to set a target amount for your savings goal, as well as the option to set a target date to make sure you reach those goals on time.