Will Port Forwarding a Router mess up anything?

So, I've been trying to make a Minecraft Server for a while and I've now got a Router that works with port forwarding. I asked my Dad if I could port forward, but he says that I might screw it up. When I port forward a router, will anything bad happen? Could I allow unwanted viruses or can people hack into the router, taking control of my computer? I haven't done this before, and I'm really scared something might happen if I don't do it correctly or if I unintentionally let a gateway for hackers and malware to invade my privacy.

In general, port forwarding is safe yes but you must also remember to have the right security set up. You are more likely to get hacked by just browsing the internet than you are from port forwarding