Cyclists often love to get their hands on their own bike, it's a way to get to know his trusty steed better and fully appreciate the features and refinement of the components, often equipped with expensive equipment.
From a technical point of view a bike is not very complexed, however, you need some specific tools for proper maintenance: pliers, presses, spoke wrenches, wrenches etc. depending on the group-set you are mounting.
You don't have to be a professional mechanic to adjust small things that allows you to maintain the efficiency of the bike, with a limited outlay and some quality tools it will make things much easier.
Whether it's professional tools "Park Tool" or more economical tools the end result doesn't change, you will be able to keep fit on your bike and appreciate the technology and materials used.