Will drinking more water help clear acne and red pimples on face?

No: Please forgive my frankness. Over-the-counter preparations do not work well either. I start with topical Clindamycin with or without a retinoic acid derivative. If needed after a few weeks, consider adding an oral antibiotic such as Erythromycin or tetracycline / Minocycline as suitable for the individual. Dermatologists have the big guns -- accutane, lasers. A clear face is your right. Good luck.