Everyone has great advice on mech buying. Hunch is a solid choice.
But since you've got a bit of a grind ahead of you, I'll try to offer some advice. The trials really arent that bad- I have been rolling with the Awesome and I've been real pleased with it. I didn't play too much yesterday, but out of 6 matches my team won 4. I got at least one kill per game.
I saw somewhere on these forums that, when piloting that specific Awesome, you want to hang back until you spend -all- of your LRM ammo. Once you do that, start moving up and engaging at medium range.
Go slow, and make sure you have a clear shot with your missiles- wait for the target to slow down before launching a salvo. I see a lot of players in these videos spraying and praying with their missiles and it seems like quite a few salvoes are flatout wasted on a fast moving target. Stay in cover! Buildings and tall cliffs are your friend. So long as you can back up in a jiffy to avoid a cloud of enemy missiles, you'll be just fine.
Try to slow your mech down a little/stop completely when you whip out your large lasers (so long as the situation allows). The less you move, the less heat you have to deal with.
Good luck with the grind! It goes faster than you think.
Edited by BertyBargo, 31 October 2012 - 09:55 AM.