Hi MrBigley,
Welcome to Traders Laboratory and welcome to the world of micro trading
Adjusting your trading from a longer term timeframe to a intraday timeframe can be quite a challenge. My personal opinion on new day traders is to learn the game by observing and practicing at first. Specialize in a certain market. If you plan on day trading stocks, specialize in a few stocks. This way you can learn its personality and the big players behind it. You will be competing against the best.
You will also need to learn a whole new set of tools that can help you in your day trading. Im a futures trader.. but I can give you an example of the tools I use: TICK, TRIN, Pc Ratio, Premium are all examples of market internals.
Regarding your account size, I dont recommend dumping all your risk capital into your first day trading account. Its going to take some time to learn this game and the worst thing you want to do is to lose all your capital once you learn it. Trade small at first. Dont focus on the money but craft your trading skill. Develop strategies that you can use and find a intraday trading style you feel comfortable with. Know thyself and your trading style. This is so important in finding trading success.
Hope this gives you an idea and feel free to ask us any questions. Plenty of great traders here that are willing to help.
Soultrader