What if I don’t have many projects?:

Create personal projects in your free time to keep building up your portfolio.

Document your process from research to the final design implementation, discussing what led you to make the changes and the outcomes your designs lead to (or would lead to).

Sometimes in the beginning, it’s ok to take on unpaid work to build up your portfolio. Maybe you have a friend or relative that could use some design help, which you can turn into a portfolio piece.