What kind of platform most suitable for a beginner to consider?

hi - welcome to the forum!

when you say “platform,” do you literally mean a trading platform, or are you (as I suspect) actually asking for a recommendation for a broker?

there are plenty here

personally, i think it’s hard to do better, overall, than Oanda, and it has a few specific advantages over some other brokers, namely:-

  1. it has “infinite position-sizing granularity,” which is basically a pompous way of saying that it’s set up to handle penny trades, and whatever future multiples of those tiny sizes you rightly want to start on, after demo
  2. it’s well regulated (absolutely essential!) and they’re honest people
  3. it has much better charting (“trading platforms”) available than most forex brokers - specifically, what they call their “advanced charting” (don’t panic: it isn’t very “advanced”!) is their own version of a very good trading platform more widely known as TradingView, and i recommend it … but in this context anything that avoids the one called MetaTrader is worth thinking about

good luck!