The good thing about cryptocurrencies is that anybody can trade cryptocurrencies and can start with any amount.
But obviously it won't sound logical to start trading with $1 would it ?
So in order to start trading at least consider to invest $50 and see how it goes.
Most traders don't have a good beginning but then earn good profits as they go along the way.
Only experience can make you better. Start with little and increase the capital when you start earning good profits.
Start with journey using small amount of investment capital and eventually you can top up more once you already convinced that you are able to generate good outcomes. It's not always the amount of investment but the knowledge that you learned from the trading practices that you take, always remember that trading have a risk behind so use the amount that you can afford to lose but make sure to learn from it and use it as your tool to succeed.