What are you expectations from a photo editing software? It's important to know what you want an editor to do for you. Photoshop is without a doubt the most complex tool out there, but if you're only beginning your journey into photo editing you may want to try something simpler, more intuitive.
If you want to improve the aspect of your photos, do adjustments like boosting the colors or adjusting the light intensity, Lightroom may be an option.
If you are focused on productivity and want to resize, watermark or convert many images at once, you can try BatchPhoto.
Anyway, you can find something useful in many photo tools, just figure out what you need.