and yes run a PCT, it cannot hurt. if you need to put a quality PCT together just go on the PCT forum or just ask.
and take advantage of your test levels at your age. it will pay off long term
eat up all the info off this site. when i was your age there wasn't good sites like this out there, its taken years and some great members to make EF what it is today.
i used to checkout 20 year old weightlifting books from the library to learn and luckily i had a very good weightlifting coach in high school to learn from as well.