So, I've been practicing a lot since I get my wacom, I need to focus in various details (like backgrounds per example), but I think its a good start.
About the illustration (if its can be called like that xD), I thought it would be funny spiderman trying to take a selfie and dropping his phone, because its really common (I mean the way to grab the phone is really uncomfortable)
I know Spiderman have super-human reflexes and his spider web, but maybe he needed an excuse to change his phone *wink wink*
If you're asking how Spidey uploaded his photo to Instagram, easy, he take it from dropbox and then he uploaded from his super tablet :).

Hope you like it!

Good luck y'all!