Tell me please which platforms would you recommend to me?
There is no one single exchange that could be recommended to everyone. It depends on some factors:
- What country are you in?
- What trading pairs are you planning on trading?
- What kind of deposit do you plan on doing?
If you're trading altcoins, probably Binance or OKEx.
If you're mainly going to trade fiat:BTC or fiat:ETH, then probably Coinbase Pro if it supports the country you're in.