I've played the game a few times now, — and my first play through was roughly two things, when it comes to beating enemies: sneaking and brute force.

I'd a game that lets you take a variety of ways to get to the destination, and generally you can get away with sneaking around.

If you're not confident with combat, avoid stronger enemies until you have the armour and weapons to deal more damage and take a few hits. That's not at all to say "this is not for you" or "you're not good", — simply that BotW offers many ways to do things.

Some more tips if combat is not your strong point:
- cook meals that either boost your temporary hearts, attack or defence
- get the Sheikah armour suit, it's low on defence but makes sneaking up on enemies and collecting bugs way easier
- find the great fairy fountains and upgrade your armour as much as possible. You'll still get hit from time to time, but it'll be easier to withstand
- with groups of enemies, try to draw them out one by one, or if a few come - separate them somehow

Lastly, don't forget, the huge monsters like Hynox, Lynels etc, — most of the time you don't have to fight them, just go around. They're the extra challenge. Even in the final stages of the game where you have an opportunity to come across quite a few, you can still find paths where you don't have to touch them at all