I am still fairly new to tabletop RPGs, but I am trying to create maps for the campaign I am designing (I just don't have much ability when it comes to translating what's in my head to paper).

Here's what I have in mind:
1 map - whole map of the world, consisting of 5-6 continents
1 map for each continent laying out terrain, cities, villages, caverns, etc.
Smaller maps for each major city, castle/keep, cavern/dungeon, etc that shows the layout of each (for exploring purposes)

To start, I really am only trying to get the world map and maps for just one continent, as I don't think my adventurers will be getting to any other continents any time soon, so I should have time to get those taken care of later.

Anyway, any help or advise on how I can get these maps created would be greatly appreciated.