Just want to add, while I mentioned that the fills with eSignal paper trading were less than realistic, I still feel paper trading, using a realistic platform, can be a very important part of starting out trading.
While undoubtedly your emotional response to trading with real money will be different, it is very important to have a understanding of the mechanics of the process as well as a feel for the market before jumping in. Lots of mistakes and money loss can be avoided if you run through the process for a while
I paper traded for months before starting with real money, and it was helpful in that regard. I am very thankful I did not make some of the order-entry mistakes, etc, with real money that I was making paper trading.
That said, I think that it is a mistake to rely on the results of your paper trading as an indicator of how you will trade live, and this is a very easy trap to fall into.
For example, I got to the point where I was doing wonderfully paper trading for a month or two solid before deciding to make the switch, and once I did, I immediately began loosing money. This was due to an inflated sense of confidence due to the paper trading, and trading too big size because of that. Once I realized the probs, it took a while to dig myself out of that initial hole. Bummer of a way to start.
Please be aware of this phenomenon, and do what you can to avoid it.
Get a great feel for what trading is all about via the simulation, but when you decide to jump in with real money, take it very slow. Small shares, take your time, focus on making great trades and not try to make a ton of money each time.
Also, a very important (critical to my strategy) part of trading is money management and position sizing. If you can read up on some of this while you are still trading on paper, I think it would benefit you greatly.
One last thing, you mentioned trading the open. Not trying to be discouraging, but the opening is a pretty tough time to trade for the unprepared as it is highly volatile. Many traders avoid trading the open because of this. Take note of this during your simulated trading, and if you decide you want to do it when you go live with the money account, I would suggest go really small shares.
Enzo