I'm currently level 6. I've escaped Helgen, went to riverwood and then got the golden claw quest. I'm in the end of Bleak Falls Barrow where, for I've searched, I was supposed to get close to the Wall, learn the Word of Power, fight with the Draugr Boss (or something like that), get somo of his items to complete the quest and get back to riverwood. However, I get close to the wall and...... nothing happens, how fix this?

Are you looking directly at the glowing draconic words for a while?

yup, nothing happens

Are you using mods and if you're using mods then we need to look at your loadorder, please post your loadorder in a spoiler?

[spoiler][/spoiler]

If you're using Wrye Bash then you can forget the spoiler tag since the spoiler tag is already included when copying an active loadorder via the Mod Checker button in the left bottom.