Hi there,
One thing, I don't quite get why you need to plug in your amp to computer if you're going to use pod farm to dial in your tones anyway. I mean I understand that you're going to be using it as a Direct Input but it's a lot easier doing that through an interface.
If I were you, I'd get a guitar interface; some are very inexpensive and fine if you're just starting out. The Line 6 UX1 is a good start or there are others. Even the IK Multimedia iRig could start you off. That just enables you to go straight DI and dial in your tones in Pod Farm with minimal hassle.
Hope that helps.