How long does it take to go to school to get a law degree? How long does it take to get a medical degree?
Do you actually think you can apply a few indicators to a chart and trade and make money? It's not going to happen.
You have to spend years learning how everything works. And then you might have a chance to make some money, a small chance.
To trade you need at least 25 grand and you will loose that quite quickly.
You have no idea how the odds are stacked against you.
Do yourself a favor and just buy some QQQ whenever you get some spare money. And watch it gtow.
IMO, a simple, short answer to your question would be: If you are in the UK and intend to spreadbet popular products, £2000 would get you started, but you will more than likely lose it all. So only trade with what you can afford to lose. People who eventually make a success out of trading have been trying very hard for a long, long time...
Find consistent and established uptrends on the daily time-frame chart. Use one or two MA's for confirmation, differentiation and ease of recognition. Wait for a day with a lower daily high and lower daily low and set a buy order just above this day's high with a stop-loss just below its low. Or wait for the second such consecutive day and enter the buy order then. Adjust position size so that your max. loss will be 2% of your account capital.
Exit manually on any day with an unusually higher close or after 4 consecutive higher closes. Or some other simple parameters.