Web search for a forex broker who accepts clients based in your country. Look for one which is large, well-established, with no scam reports across the internet, preferably based somewhere with strong regulations such as the EU, the UK, the US etc. (not Cyprus, the Seychelles, Bulgaria etc.).
Ask them for a demo account and a live account. Select a simple strategy from the site or the web or books etc. and run it through the demo account until you understand how it works under all conditions. Then start running it through the live account, making sure your potential loss per trade is a very small percentage of your account capital by using a stop-loss order.
That’s when all the fun starts.