Practical ideas:

1. Find a photo you like of your own, and apply all photoshop filters on them to visually analyze them.
2. Find a photo of a great photographer or painter you like, and try to imitate or mimic it 100%.
3. Look at a renaissance portrait you like, and try to imitate it as a photo.
4. Start a selfie project of yourself: Shoot a selfie of yourself everyday for a year. Flexing is good too.
5. Upload a bunch of photos to Google AI Vision to visually analyze your photos using AI and computer vision.
6. When you are puzzled whether you photo composition is good or not, sketch it as a drawing, or upload it to arsbeta.com for real feedback