Security risks with running bitcoin core, and how to protect yourself

I’m new to bitcoin and want to help the network by running a full node. I plan to download bitcoin core from the bitcoin.org website, and run it on a spare laptop, by my concern is how do I protect my machine from attack? As I understand it, my IP address will be visible to see. Do I install specific security software or are there other practical steps for me to take?
I would appreciate it if answers can be made in simple, and if possible not overtly technical terms as I’m new to all of this.
Many thanks.