My old Macbook (white) was really easy to upgrade. I want to eventually replace my HDD on my 13" MBP with a SSD but I'm afraid of taking it apart for some reason. is it worth just paying a pro to ...

Do you have a Macbook Pro or Macbook? I presume the Pro since you were more specific in the title, but it makes a big difference how easy it is to replace a hard drive, if that were needed.