Winning mentally is half the battle (if that makes any sense).
Losing hope halfway through a match is probably the worst thing you can do.
I know that you have said that you didn't buy this to "sit alone by yourself" but you should seriously hit Challenge mode, if you haven't, and training mode. Not ALL the time mind you, but it's good for getting better at your inputs, combos, and blocking.
You'll probably get the best experience and improvement from playing online though.... I'm sure there are some people around here with PSN who would be more than glad to throw down with you.
I'd play a few matches with you but I don't have PSN.