To get paid as a graphic designer you have to be competent first and have a portfolio which is basically a collection of your work, the best way to start making an income is to start offering a service on forums, if you’re in Nigeria nairaland is an amazing platform to get started on, all you have to do is go to the business section and create a thread, display your graphics, offer your price and over time you build a clientele that’s if you want to start locally.

Or you can go on Upwork and start offering your services to the international market and get paid in USD and I don’t think you need a PayPal to receive payment from a freelancer platform, good luck