Alduins wall is a Main storyline quest, and as such is unmissable if you play the main story.
The quest itself features 2 puzzles, none of them are too much trouble..
Puzzle 1 - A pillar moving puzzle, there will be 3 pillars next to each other, simply rotate the pillars until they display the symbol that is already on the pillar to the far right, the dragonborn symbol. MEMORIZE THIS SYMBOL.
Puzzle 2 - This is a room full of tiles, the only way to avoid setting off the trap, is to step on the tiles that have the dragonborn symbol from puzzle 1 displayed on them.