I wish I'd had the advice that's available when I first started walking (before the days of t'interwebbymajig).
The Ordnance Survey not only produce what are probably the most comprehensive maps available to the general public anywhere in the world, but they also have a great range of material teaching you how to read them, and how to understand them to allow you to sucessfully navigate with them. Have a look here: https://www.ordnancesurvey.co.uk/resources/map-reading/
As far as I'm concerned, navigation and map reading ability should be a prerequisite for anyone heading for the great outdoors.
The Ordnance Survey not only produce what are probably the most comprehensive maps available to the general public anywhere in the world, but they also have a great range of material teaching you how to read them, and how to understand them to allow you to sucessfully navigate with them. Have a look here: https://www.ordnancesurvey.co.uk/resources/map-reading/
As far as I'm concerned, navigation and map reading ability should be a prerequisite for anyone heading for the great outdoors.