High Michael
Thanks for the vote of confidence.
If your only down a couple of hundred well done. Most lose thousands before they start asking questions. I would say throw the tip sheets out and concentrate on 1 or a couple of methods that have pricked your interest in books. Make sure you keep GOOD records of your trades. Very important to cut the mistakes out. One tip I can give you is its a simple game, learn about position sizing and money management and if your trading short term learn a couple of simple chart patterns that you see reoccurring and how to trade them.
DOM is Depth Of Market or the order book(see pic this is for the SPI). And no I would think a newbie doesn't need one just concentrate on learning how to trade chart patterns.
If your trading intraday you need real time data. Which I think IG has. If its index stuff you are trading I would think you should throw away the CFD charts and get some futures data, that is what the Index CFDs are linked to.