If you're just starting, you've got so much natural potential to start with before doing any gear. You'll gain rapid increases in strength just after a few weeks.
If I'm starting back after time off, i start off light with an all over body routine 3 or 4 times a week. Increasing weight and reps every workout and getting your body used to lifting weight. Once your passed the initial doms, I train specific body parts over a split routine, there's plenty to choose from.
After a few years and you feel like you've plateaued and you've got some experience, knowledge and dedication, then you might want to consider some gear. Doing it now will just cause harm and you won't get much out of it.