For today , I am truly attentive on my work.

Attention is not effort. You can grind for three hours and give the work almost none of it, reading the same paragraph four times while some argument replays underneath.

The tell is rereading. The moment you notice you have covered the same line twice, you already left. Pick one block today, an hour at most, where the job is to catch the drift and come back without scolding yourself about it. Coming back is the skill. Not drifting isn't available to anyone.