Core is your best bet, I'm tempted to spin up Knots to see what GUI changes Luke has done, I just don't agree with the default relay settings so I'd change them. Sparrow is a nice tool as well. I'll be honest, I rarely run my node, it's typically off months at a time. Peter Todd has also started his own distro called Libre Relay which has a more relaxed op_return and a new RBF called One-Shot but it's still super beta.
The thing that has really helped me learn the innards to all this was Jeremy's advent calendar that he made for CTV. I spent a good year trying to decipher it all and I'm still learning.
I've written two of my own essays to try and help teach what I've learned.