Like a sort of crypto-trading platform with a demo account. Yes, it's really good to test strategies before going live.

You can try their testnet version here: (not promoting it)

a) Bitmex
b) Bybit

Remember, once you have done simulations to feel the trading experience, it doesn't mean you have to go live here. It's all depends on you.

Spend time researching the best trading platforms around and yours to decide what to choose.