As an amateur cook myself i would like to point out that the passion cooking should come from the Heart. Preset a dish that heals your Soul.
Anyone can cook , but what makes you different is how well you cook.
Just like any other field you learn by practice and in cooking self play an important role.
Online you can fine infinity number of recipe which you can use for your practice. with each dish you make you will learn something new.
In case you are passionate you can go for couple of weekend classes to get the basics right.
Mostly in the culinary school they teach you different techniques which is not required if you are not making it a career. One important thing i would like to mention is there is no certain set of rules you will learn and it all comes to experience and practice.
The best mentor will be your MUM while you are starting.
I would suggest you get the following book:- Mastering the Art of French Cooking by Julia child
This will help you improve your technique.