I got varifocals and hated them - ddrove away from the opticians unable to see anything to either side without turning my head; so turned round, drove back and handed them in. So they made me bifocals instead, and that is my recommendation, thoug I know others are ok with varifocals.
You'll become a full time glasses wearer when your eyes tell you to, alas. It doesn't mean you're old, it can happen at any age. But is your vision actually causing you problems? If not, then hold off until you think you need them (eg can't drive properly)