Tropezarme literally means "to stumble" or "to trip." It's a common verb, but its reflexive form here adds a layer of personal vulnerability.
In the song, the singer uses it metaphorically to express his fear of making the same mistakes in love again. He says, "No quiero tropezarme," meaning he doesn't want to stumble into another bad relationship or fall for false hopes, making it a relatable and emotionally charged word in this context.
"Dirección Equivocada" is a regional Mexican breakup song about guarding your heart after being hurt. The singer tells someone flirting with him that they have the wrong idea about him: he isn't looking to be played with, and he isn't naive.
He looks back on a past relationship that filled him with hope and butterflies, only for it to turn out false. That experience left him wary of promises and unwilling to get his hopes up again.
Each time someone new comes around wanting to "play," he warns them off, saying they knocked on the wrong door. He admits love still tempts him and he's afraid of falling again, but he'd rather protect himself than risk another heartbreak that ends, as he puts it, in drinking away the pain.