Starting your photography journey with a Canon 400D is a great choice, especially for landscapes and architecture. To improve your skills, learn the basics of exposure, use manual mode, experiment with different lenses, and use the rule of thirds, leading lines, and foreground interest. Practice using tripods, exploring different times of day, and learning basic photo editing techniques. Join photography groups for feedback and inspiration, and watch tutorials on YouTube for specific techniques or camera settings. By applying these tips and practicing regularly, you'll develop your skills and find your unique style in photography. Enjoy your journey!