The greater the leverage, the faster you will burn through your account, especially for those just starting out.
For those just starting out and trading, it is important to gain experience and especially to have a statistically profitable strategy, so it pays to trade in simulation (or paper trading) at first, but avoid leverage because you risk burning your account quickly.
Even successful traders such as Mark Minervini, Oliver Kell, Kristjan Qullamaggie (see video below), etc.., burned their accounts in the beginning, precisely because experience is needed and trading successfully is not easy.
P.S: Your friend advised you well, that Broker that allows 1:3000 leverage is not a reliable Broker, in fact in Europe with CFDs a maximum leverage of 1:30 is allowed.
Mark Minervini https://youtu.be/W5ljClz4H3g
Kristjan Qullamaggie: https://www.youtube.com/watch?v=WswZwmr2ebU
Oliver Kell (2020 US Champion Trader): https://www.youtube.com/watch?v=ltXlF8Z0WFg