Mgste,
I really dont want to put a spanner in your works, but you should really know all of this stuff before starting to trade real money - unless trading is more of a hobby to you.
Trading demo's provided by brokers are well known for making people rich on paper very quickly so they start paying commissions asap. Maybe you should try paper trading off real data first?
Either way, you must understand the basics like tick value, lock limit markets, roles of participants etc. Take your time. It will be worth it in the long haul!!
Good luck.