I would just leave it a bit. You can always trim flyaway hairs with scissors when you see them. Some guys will trim all the flyaway hairs they see every day. But that is too much work for me. As for your moustache, it is generally best to trim right at or below the lip line. For you at this point, this just means trimming those hairs that are curling around your upper lip. If you choose to grow and train your moustache, check out the Taming the Wild Stache thread in the Mustache General Questions forum

Stop trimming your moustache; greater glory awaits!
...but if you are going to trim, do it right, go pencil...
...then, of course, a nice copstache can be cool too...

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