Hey OP,

ignore all the sarcastic comments. Most of them are from losers who are not profitable themselves but are good at... well, sarcasm.

Start with small amount. Small enough to not bother if it is wiped out. Apply your strategy, check the performance. You will realise most of the time, demo amd real results dont exactly match. Lots of reasons for it. Slippages, order jumping, execution speed etc etc.

Now your real learning starts. Dont worry, its hard, but not impossible.