WELCOME xristosx to "Dreamviews".

By reading some of the Tutorials on this site you may get the impression that it is a natural thing to have a LD. For some people it is and we simply become lucid (it took me 49 years to have my first LD, I did not know it was possible before that) but for most people it requires learning the skills necessary, having patience and practising.
Having a LD is a fantastic and unbelievable experience and well worth any effort to achieve. That is the first step and then you have to learn how to control it.
Start by keeping an extensive dream journal and develop a habit of doing reality checks throughout the day. This habit, once developed, should happen during a dream as well and when it does, you will become lucid and probably wake yourself up in the excitement.
Dont try to become lucid, let it come to you. Patience and persistance are essential, frustration and impatience are inhibitors.

There are many people in the same boat as yourself and have succeeded.

Good luck and best wishes.