When time expires:

The most famous method, using 25-minute "focus" sprints followed by 5-minute breaks.

Starting is often the hardest part. Committing to just 25 minutes of work feels much less daunting than "finishing a whole project".

If you’d rather tell the from the beginning, go ahead — I’m listening (or reading). Just paste it, and I’ll help you move forward from that desktop timer moment.