I hope it's possible. I'm in a similar situation, but I fear that everything is hopeless because I just lack any semblance of self control at this point. Every time I try to make a resolution to abstain from the computer or do something productive, I just end up giving in to mindless pleasures. Personally I think a lifetime of engaging in mindless pleasures without putting in any effort has rewired my brain in a way that makes it very difficult to change. I hope you have more discipline than I do.