Install Picto, then open an image with File › Open…. The panels you use most are Layers, Properties and History.

1. Install Picto.
2. Start Picto and choose File › Open…. To start from nothing, choose File › New… and click Create.
3. Pick the Horizontal Type Tool, a selection tool or an adjustment, and work on the image. Every step is listed in the History panel and can be undone.
4. Keep your layers with File › Save As… (PSD or Picto), or make a flat copy with File › Export › Export As….

The guides walk through each of these:

• Open and save files
• Adjust colors without changing your pixels
• Select part of an image and mask it
• Add and style text
• Export an image