As a beginner trader I prefer trading forex here. Yeah, yeah, I know that I am not super original in this case, but sry, guys, it's just something I've learned from different trading course. FX market is the more amenable to analysis than others if you are an unskilled trader.
So, spreads are to my liking here. For instance when it comes to trading eur/usd pair, then they are averagely 1-3 pips which is okay for me. I don't see loads of money is deducted from my balance when I close trades.
They are invisible, hehehe.
Also, there are some more markets, but I haven't tried them yet.