How to prepare a configuration.nix prior to installing NixOS

Hello, hope your all well?

So I'm about to install NixOS on my primary workstation. I've been tinkering on an old laptop, learning flakes, getting to grips with home-manager and the nix commands especially garbage collection.

So the configuration.nix I've created on my laptop, isn't all the tooling I'll use on my workstation and honestly, I can remember half the stuff I've installed or tools I install along the way.

So here is my actual question is there anything like a nix config generator, where I can cherry pick apps, services and utilities?