>>2035062This is how I would handle some of the lines and coloring of that image as an example.
As for the gradients, linear and radial gradients are fairly straight forward, as you can see on the right. All I did was pick 2 colors and drag the linear gradient from bottom to top. I'm assuming you mean the color you used? The original has very desaturated and grey colors so I would advise against color picking directly from them. Use the color whell to get something close to that but more vivid.
>>2035098Makes sure to take advantage of the very smooth curves the pentool offers for best possible result. You generally want to use the least possible amount of nodes and make the most out of your curves. Refer to bottom section on how I did the nodes and handles.
Hope this helps.
