One example is when I first started working on body weight exercises after my transplant. I couldn't even squat down to get dishes from the lower cabinets in the kitchen without putting a knee on the floor. I also need to grab onto the counter to stand back up. At that time squatting to a chair was difficult, and a full range of motion squat wasn't even on my radar. Well, it wasn't on my radar until I saw an image of Al Kavaldo doing a squat. I looked at that image every day, thought about it while doing my squat progressions, then one day achieved a full range of motion squat when working in the garden. It took months of work, but I got it done. My posture is still not perfect, shoulders are a little forward when I'm not holding any weight, but I can comfortably do a full squat.
My posture is not perfect, as you can see, but attempting perfection has gotten me to where I am today.
What is it that you want to achieve? Can you see yourself accomplishing that goal, I mean really "See" yourself?
Give it a shot, the journey is worth it.