That looks pretty good to me.

At 25 years old I would try to use the general area of your natural hairline (when it was there). For some people you can scrunch your face up and it's easily visible. Other people might have to guess it. Actually I'm 37 and I still use my natural hairline with just a bit of recession.

Those are pretty strong temple points, which can really help with the realism when you get the shape correct and they line up with your sideburns properly. The only thing is with temple points that strong I would make sure you draw on the direction you want them ventilated (probably down and back). Actually i would do that with the whole piece AND send a picture of the style you are trying to achieve so the factory can see that it's going to be a guy wearing it. This is especially important with short styles, since ventilation is crucial.