Hey there! The pose feels a little awkward and unbalanced, so I'd rather focus on correcting that first. I'll try to help you with the clothing another time. :) You've drawn the elbows and knees at the same height, which isn't quite correct... Since the ribcage is raising the left shoulder, it also lifts the left elbow slightly, while the opposite shoulder drops, bringing the right elbow down a bit. Ideally, the elbows should follow that same tilt, which I've indicated with the red line... Although I think I may have exaggerated the pose a little. As for the knees, they also shouldn't be perfectly aligned. Just like the elbows, there should be a slight tilt because the right leg is raised a bit. On top of that, the left leg isn't completely straight. Notice that I pushed that leg slightly backward to create better balance and improve the overall flow of the pose. I hope this helps!
Thank you!