Its best to have some defence in depth. Ideally you would have a firewall on your network AND your local machine. If you are running a laptop definitely have a local firewall on that as you cannot trust random networks you connect to when out and about in the world.
firewalld is sufficient, i suggest learning its CLI as it is not super complicated. ufw is ok if you are allergic to command line.
Just because you can’t stop all the leaks in your plumbing doesn’t mean you shouldn’t fix the ones you can.