Hi, i find when learning or trying new things it's best to simplify so its only the new thing that is challenging. Therefore I'd recomnend practising with simple 3D shapes first until mastered then try more complicated shapes. Painting a sphere is easier than an eye so you can focus on the rendering technique. Once your spheres / cylinders/ cubes are in the style you want then you can move onto eyes/ faces/ etc.Hi, i find when learning or trying new things it's best to simplify so its only the new thing that is challenging. Therefore I'd recomnend practising with simple 3D shapes first until mastered then try more complicated shapes. Painting a sphere is easier than an eye so you can focus on the rendering technique. Once your spheres / cylinders/ cubes are in the style you want then you can move onto eyes/ faces/ etc.Create a clipping mask / selection of chosen shape so you focus on brush strokes not edges of the shape.Use a textured brush with 100% opacity but pen pressure flow. Use large brushstrokes with light pressure.When happy with results move onto more complicated subjects but breakdown into simple shapes and paint each shape at a timewith a large brush on a new layer then erase so only the shape is filled.. Also don't worry about perfection, treat them as rough studies, its more important to create large numbers of paintings to get better.

@purifiedtony82780519

Paintover

Hello. Before thinking about style i think you would benefit more from learning the foundamentals of form and value. In this case understanding the forms of the eye and being able to simplify it in simple forms will help you a lot. After that you can start to add some values according to your light. As you practice those foundamentals you can study some artists that have a style that you enjoy. The painterly style is a result of brushwork. You really need to understand form and value to use your brushwork in a painterly style. It's hard when you start but with patience you can do it! For now as practice you can do what i did. Start by drawing the planes of your subject as best as you can. In this phase try to understand what direction the planes are facing and how they transition from one plane to another. After you get this step down you can start thinking about rendering it. To render use a simple round brush with opacity, other brushes will most probably make it harder(I did use some textured brushes for a painterly effect and it made me struggle much more than usual XD). In this stage think about hard and soft edges. Where in your reference do you see a hard edge or a soft edge and why. Good luck and have fun with it!