Tell me please which platforms would you recommend to me? Those that would be easy to use.
I can suggest to you are those exchanges that are friendly user first, so that you can operate it easily.
Like Binance, ByBit or Kucoin. These exchanges have also mobile applications where you can trade just using your phone.
Besides for being friendly, make sure you read their terms and conditions before using them so you will not encounter any issue in the future.