MainzMan: If you're consistently losing credits on Ready Go's then I'd stop entering and play the weekly and monthly tournaments instead. Apart from the premium ones they're free and the competition is almost as intense.
I have to concur - looking at your score history you are effectively throwing away credits by entering.
My advice is to use a PC or laptop to play the game for better stability and features. I have heard that iPad and phones are ok, but it is like half a game (I have not tried either).
Try and play to level up and better equipment becomes available, plus the experience from learning the game, you will then be better equipped to play RG's if you desire.
The forums contain a huge amount of great tips, so search for information to improve your game. It takes a long time to master the game (I am still trying to do so lol) but also ask for advice - especially if you are contemplating an equipment upgrade - it will save you money.
Most of all have fun, it is a great game and there are some great players who will offer advice when asked!