docs-cardano-org VS plutus-pioneer-program

here you go: https://github.com/cardano-foundation/docs-cardano-org/blob/main/explore-cardano/what-is-a-hard-fork-combinator.md

In response to the above problem, instead of fixing it, they just removed the respective documentation. Big red flags

We have the hard fork combinator which makes hard forking quite easy. It eliminates the necessity of a switchover block.

If you want an easy entry into Plutus and Cardano smart contracts take a look at https://demeter.run/ and plutus pioneer program cohort 4 content

and the course materials, including assignments and HW are updated weekly here: https://github.com/input-output-hk/plutus-pioneer-program

Step Three: learn Plutus. Check out the Plutus Pioneer Program.

GitHub repo

There's a little more to it than cloning an existing repo and installing it somewhere. I think the very first thing you should do is go through the pioneers program. https://github.com/input-output-hk/plutus-pioneer-program