alt Hacker Newsorcad is the commercial classic for doing schematics with a spice backend. (spice is an oss engine out of berkeley for simulating circuits on computers. for dc it just solves the classic nodal analysis and for ac you can feed in things from a fantasy signal generator and capture things at various nodes in the circuit) there's also some pretty cool looking commercial web thing now that also will maintain netlists with real-time prices and will let you swap parts out and set minimum quantities etc.
kicad is the oss orcad, but i never got good at it. (to be fair, orcad was weird to learn as well)
I think altium has taken over as the top tier commercial offering in this space.
I always disliked Orcad. Especially because cadence had excellent software that predated OrCAD, and for reasons that I cannot fathom chose to promote OrCAD after they acquired it instead of the better software.
Here's a specific example in the interface. If you wanted to draw a wire, the keyboard shortcut of the old software was 'w' but orcad required you to type 'ctrl + w'. Why are you forcing me to use control when w doesn't do anything on its own? It was filled with similar tiny annoyances that just slowed things down. (Admittedly, it's been years since that was my primary work, and free stuff is good enough for what I do now.) I sincerely hope that orcad has continued to improve over the years.