Well, I think its worth it. If you believe that its not, its your choice, I can't do anything about it... So yeah, do whatever you think is the best. :)
No they wouldn't be different. Keep it up for a bit more, if it doesn't work out, yes give up. But don't give up just because you think its not worth it. Give it a try ;)
You advice me as if you knew and I appreciate that, but like.. who would ever care to do so.. I mean.. why do you insist?! Do you know smth more than I do anon or what?