For photo retouching and image processing work, the strongest message from the community is that clients usually care far more about your portfolio, reliability, and turnaround time than about formal certifications. If you want paid work, focus first on building a portfolio that matches the kind of clients you want to serve.

Certifications generally are not required. They may help you feel more confident in meetings or give some clients an added sense of professionalism, but they are usually secondary to showing strong before/after examples and proving you can deliver usable results on time.

A practical path would be:

• define your target market
• build a portfolio tailored to that market
• show consistency, communication, and speed
• use training or certifications only if they help you improve your skills or present yourself better

So, education and certifications can be helpful personally, but they are rarely the deciding factor. In this field, your work and reputation are usually what get you hired.