Uhh, hey. My suggestion is exactly what the title tells you.
I haven't yet TRIED the PvP, simply because I'm afraid I'll get some SERIOUS criticism from other people, or just loose money in general, considering I have no experience, and haven't practiced at all.
So that's why I'd like a Private Match mode, where you can't earn crowns, but it doesn't COST crowns either.
So you could practice or just play for fun, with your friends U:
Okay, that's all. <_>
It's actually fairly difficult to lose money playing Lockdown. Krog coins are worth about 100cr each when you trade them in for mod calibrators to sell on the AH, so if you lose a match you're only down 100cr at most, and if you win you're up 280 (2 coins and 80 cr).
T3 lockdown can be quite frustrating, but T2 is fun. Just get yourself a 3* set of amour (piercing defence is preferred) and surf some threads in the arsenal forum for what weapon loadouts would suit you (generic answer: pierce sword) and heat it up to level 10. That'll put you head and shoulders above most noobs already.
Once you've done that, just dive in and play guardian for a few rounds. It's pretty much the easiest class to play, just park yourself on points with your team and shield over them, and go on the offence once your shield breaks.
On the average day, only about 25-50% of the players in a given match are actually any good at the game. You're not going to be the only newb playing.