Scarleteen

I’ve recently been taking medicine after a random visit to the doctor.
I guess— you can say I’ve had a small checkup, I’ve got examined, similar to something you’ll get at the OBGYN.
Although, my medicine will be on my medical reference.
Also, I’m not sexually active with any partners. But I do masturbate occasionally.
Should I begin to get legitimate checkups at the GYNO?
Or should I save that when I fully become active?

The current standards for this are that a person should -- specifically -- start getting pap smears (that's a screening for cervical health), either around the time they have started engaging in any kind of vaginal/vulval sex with partners OR when they turn 21, whichever comes first.

That kind of healthcare is also something that an OB/GYN can do, but also a kind that many general practitioners can do, too, including ANRPs. Who you see for that care is often a matter of preference.