It took a weekend for me to "break" it, as you say. This is way lower than a lot of other games out there. I do not find it specially intimidating
You need to know that basic difficulty to do stuff is 14. You roll XD6+D12, X being your skill level for the ability. So a skill of 41% chance of success, and skill level 3 about 2/3 chance of success. If the D12 gets you a Gandalf rune, you get an autosuccess, and if it is an eye of sauron you are screwed. The 6s you get make your successes better. If you are tired, the 1-2-3 values in the die are not added up when you roll, so you roll significantly lower. You are weary when your Endurance falls to your Fatigue level (fatigue is adding up all the Encumbranc eof the gear you carry). These mechanics works for all stuff.
For combat, you select one of the 4 stances (forwards, open, defensive or rearward). Rearwards can only be chosen if 2 guys on your side are fighting in the other stances. Each one has a target number that is used to hit and be hit. To hit you use the target number + the Parry of the opponent. SI if you are in Open (9) and the orc you face has a Parry of 3, you need to roll 12 or more to hit him. They will have to roll 9 + YOUR Parry to hit you.
If you hit and roll equal or above the Edge of your weapon (for example, 10 for a sword, so you get an edge on a 10 or a Gandalf rune) you score a Penetrating hit. A critical hit, basically. Then the target needs to equal the damage of the weapon (16 for a sword) rolling his armor dice+D12. If he equals or rolls above, you score normal damage (5 for a sword) if he does not, he gets that same damage AND is wounded. If wounded, most enemies fall dead automatically. A hero wounded does not die immediately unless he is wounded again or is wounded AND falls to 0 endurance in the same turn. being wounded is important because you recover really slowly and are in danger of dying if wounded again.
If you fail a roll, you can spend a point of Hope to add the Attribute associated with the skill to the roll. If it is a favoured ability (the underlined ones) you add the FAVOURED attribute level (the higher number in the smaller circle). That value is added to your basic result.
And this is the basic mechanic of the game

Way less complicated than most games out there. There are other stuff (sub-options for the diverse stances, how you recover Hope points, the use of valor and wisdom...) but you can have a whole adventure with what I just wrote above. The basic adventure in the book seems like a good place to start, since it shows quite a lot of the mechanics in diverse situations in a straightforward adventure.
Cheers,
Xavi