What is Creativity? Is that even an answerable question? The dictionary says Creativity is “The ability to transcend traditional ideas, rules, patterns, relationships, or the like, and to create meaningful new ideas, forms, methods, interpretations, etc.; originality, progressiveness, or imagination”- http://www.dictionary.com/browse/creativity
I decided to ask a friend of mine and she said “being creative is the expression of an idea that cannot be fully defined simply by describing it” I found this interesting as it makes sense yet it differs from the definition.
To me, creativity is the result of thinking openly and expressing ideas that some may never uncover.

So, How do you grow a creativity? How do you become creative?
according to https://thenextweb.com/creativity/2017/06/21/11-brutal-truths-about-creativity-that-no-one-wants-to-talk-about/#.tnw_L5nbPTen You already are creative, everyone is creative. I think the problem is a mix of self-criticism and close-mindedness.
The best ways to expand your creativity seems to be teaching your brain new things and opening your brain to new ideas. As said a previous post, music can increase creativity. However, not just learning an instrument but just listening to it as was said here: https://www.forbes.com/sites/alicegwalton/2017/09/06/listening-to-happy-music-may-boost-creativity-study-says/#79ad72d63357 
I want to challenge you to grab a pencil and draw something or pick up any instrument and try to play it.
Take this video as an example:

However, Being creative is not just all about arts. Creative thinking helps with everything from problem-solving to living a happier life. - https://www.bestpracticeconsulting.com.au/_blog/Articles/post/Fostering_creativity_in_the_workplace/

My conclusion is, no matter who you are or where you are from, you should try being more creative as it could improve your life.