I just received my first dose of hpv vaccine (gardasil 9). when will the antibodies begin to form? is it 2 weeks? (i do know i should get at least 2 shots?

There is no significant protection at 2 weeks, but probably some protection after 4-5 weeks. For sure get that second dose, and ideally a third. Good luck.

Antibodies start being produced right away but the rate of production varies. Gen 2-3 weeks is the period in most vaccines.

A second or third dose is recommended in 6- 12 months. More than 98% of recipients develop an antibody response to HPV in one month.