I like it. I see practice, I see intention, I see progress in trying to highlight the subject against the background.

What I think I can suggest, my friend? When you take the shot, try to have the main flower more toward the center of the frame. In these, you'll leave it near the bottom edge, and there's a lot of space above it that distracts.

But you handled the white color very well. From the time of the photos, I see you were close to noon. At those times, sunlight doesn't help much; try to take photos early in the morning or late in the afternoon.