Don't forget with Links2 you need X11 installed if you want to leverage the GUI version, so there is that added step. It doesn't sound like OP would be too comfortable at all with a text based Terminal browsing experience. I agree DarkWeb and AF are good options for the meager resources of an iMac g3 & OSX. Interestingly, Retrozilla initially did the same thing for me as OP on my B&W a few days back. I did not have the time to investigate/trouble shoot at that time
*Just got Retrozilla working. The user experience is very similar to L2 but a bit snappier. I also prefer the UI a bit more. Ive been experiencing some stability issues with L2 preceding KPs. It works but minutes in, L2 goes unresponsive in activity monitor then followed by a kp, so I am happy to report RZ working well for me now.
I think all in on these g3s I am partial to Darkweb. For me, it is a good balance between relative speed, functionality and comfortable GUI.