Hey Cool22, the thing about manual PE exercises vs extenders is that extenders TAKE A FREAKING LONG TIME TO WORK! You
will gain with an extender but it takes upwards of
years just to gain a couple inches.
The manual PE exercises will potentially show you increases in a few weeks to a few months in times (very minimal at first, BUT it is different for everyone).
Right now I would suggest doing JP's 90 Day Beginner Routine because that is free and will condition your penis for bigger and better things

as opposed to going out and purchasing an overpriced extender!
Like Stumpy suggested check out JP's Routine and do it then consider getting an extender.
Best of luck to you bro