Hi Hally, I have experience with CFD's. They're better than shares in many respects. You can bet on anything going up or down. You only risk a tiny portion of your balance on any one trade. Gearing up to 400:1 on currency swaps. 100:1 on Indices. 20:1 on commodities. They are the cheapest way of trading. Only a few dollars fee for a trade. Small risk for large rewards.
Forget Comsec or ASX. They are not where you trade CFD's. There's not much to know about them. You don't need to read books. They are just a highly geared way of trading. You cover yourself with stop loss orders.
You really need to go and get a broker that has a demo account you can practice with. CMC is OK. It's who I use and their order tickets are clear and easy to understand. On CMC you cannot place an order without a stop loss attached so they are safe. I don't know about other brokers.
I have read heaps of books, bought a few courses and joined quite a few tipster services. Spent a lot of $ for not much results. In the end it comes down to the right course that teaches you everything you need to know.
I recently found an excellent one. It was the ah ha moment for me. It's easier than I thought to pick entry and exits. No technical jargon required. Linked with a good free info service it's easy to work out trading CFD's. And there's a lot of bull s..t out there making unrealistic promises so beware.
I did very well when the market was rising trading long on the ASX but when the market is going down you need to be somewhere else. CFD's are great and not hard to understand. Once you start you'll never go back.
Just get onto a broker with a free demo account and play around. But without the right knowledge I think most people will end up losing. It's finding the right knowledge that is the hard part. Good luck.