I often draw little bits like this in Illustrator, then copy/paste as paths, or shape layers, to Photoshop where I can do the raster stuff. I don't even keep them as Smart Objects much of the time if the coloring is simple enough.
Photoshop's Pen Tool is fine - but things fail in the path interactions, anchor aligning, joints, etc. That sort of stuff is just cumbersome in Photoshop.
But this simple leaf should be easily accomplished with Photoshop's Pen Tool set to shapes. It merely takes practice to know how curves will be laid down and where the best place for anchors may be. Which is the same as in Illustrator. There's rarely a need to draw at an angle if you can merely rotate something aafter it's drawn. Often creating things on perpendiculars is helpful.
Animation is sped up to create a smaller file
Then I'd merge Shapes from the Layer Panel menu... adjust the center line a bit more.... and I've have a leaf in a single, editable, layer which I can then duplicate, rotate, and scale to create the other leaves.