Keep up this practice, and keep going and you will be amazed at how much you've learned and grown. You'll also learn what attracts and inspires you.
there is no style that you should definitely learn. You will develop your own style with time if you dedicate enough time on drawing and you are persistent enough. Besides the classic draw pad and pencil you can further explore digital media like drawing on a tablet and using a program like ProCreate which is extremely popular amongst illustrators. Developing an eye for art is helpful too - look at other good artists' work and modern illustrations (on platforms like Behance for example).
My husband is a 3D designer and a very good digital illustrator - he has no formal education in arts but is naturally good at drawing, he follows trends but relies on his own perception of what is good and what he personally likes. Also I have a very talented colleague that is really skilled in drawing and she says that every time she starts working on a new project she draws in a different style and doesn't have a set style. And don't forget that your style will evolve with time whatever you arrive at the moment.
I hope this was helpful.