I have been trading forex for ten years, so you are in good hands. Il try to make this as basic as possible so anyone can do it.
Find a forex broker (search google)
At this early stage anyone will do.
Open a demo account (Don’t Worry its completely free, no ID needed and you can have as many of them as you like)
Download Meta trader 4 (Don’t worry, Its completely free.)
This will be your trading terminal and where you will work from.
Watch Youtube videos and learn about trading and how to use Meta Trader 4
Pick no more than five pairs and start learning how they behave.
You are now ready to trade, For the time being only take trades from those pairs you have been watching.
When you open a trade do not use a lot size bigger than 0.01
You are learning, there is no rush and the market can be very volatile at times.
You may also want to consider Forex signal groups. Some are free some are paid for. They will provide you with signals basically telling you when to buy or sell in the market.