Rendering a (static) map with only specific roads and natural areas

I'm kind of confused with the countless tutorials, I'm not sure I'm reading the right one(s).

I'm looking for main directives on how to create a static map with specific items that I choose individually (some roads, some parks, some water currents). The final result will be printed on some A3 papers

Once I get started I might be able to progress on my own or ask more specific questions, but right now I'd like to make sure I begin from scratch with the right tools

Thanks !