It's up to the DZ whether you have to do a tandem first; regardless, I'd recommend it, because it's a lower-stress way to enjoy your first jump than being in charge of everything. If the DZ knows you're interested in continuing, most will let you do some steering of the parachute, demonstrate altitude awareness, and do some coaching on other aspects of canopy control (which is harder to teach on a solo jump like a static line).
I made my first jump 45 years ago, when I was 20. It was static line, simply because there really weren't any other options then. And congratulations on getting close to your weight goal; remember you're getting close to a lifestyle goal, too, because each weight has a lifestyle that goes along with it -- enjoy the increased energy you're probably feeling!
Wendy P.