Don’t use it for hiking but seem to remember it coming up in that context: Open Street Maps. AFAIK it has PC apps, android apps (osmand, organic maps etc.) and web. I use osmand a lot for maps, POI’s and navigation. Organic maps is great too. Simpler and more polished.
And you can always change career path if something else is seems more interesting at a later time. I did at a relatively late age and know of plenty of other people who did the same. It’s never too late to try something else if the first thing doesn’t works out.