You'll be asked to create a password when you create an account for yourself as an individual.
No-one else sees your password. You can choose any password that you like, which you find easy to remember. (But don't worry if you forget it - you can reset your password at any time if you can remember your email address).
Please choose a password which is secure enough not to be guessed by anyone else. We recommend using at least 6 characters, a combination of numbers and letters, at least one of which should be a capital letter, and at least one symbol.
However, there are no limitations on your password format.