More powerful options are projects like PfSense or Opnsense, but those require more expensive hardware and for most uses you probably also need a separate switch. I personally use PfSense and find it relatively easy to use while being extremely powerful, absolutely jam packed with features but an accessible WebUI and clear documentation.
Probably the best all round option are the semi open, prosumer-ish products from companies like Ubiquiti or gl.inet (the latter is even based on OpenWRT, but with a nicer UI... I have one of their routers as a travel router). Ubiquiti's Unifi routers are very easy to use and jam packed with features for a pretty great price, but their platform is not truly open source. Still, gl.inet or Unifi are what I would probably most recommend to someone like you looking to upgrade but feeling overwhelmed by lack of knowledge.
Beware it's fun to tinker and that's how I learnd pretty much everything I know about networking, but breaking the Internet will not endear your new toys to your family. It's good to have a spare in case you mess up so you can keep the bits flowing while you undo your mistake. Anything you choose is going to be an ongoing learning experience if you're starting from no knowledge, but there are lots of high quality tutorials on places like YouTube.