I’m also still working on developing my style. Though there are practices you can do to land a specific style more quickly (Lee’s dream portfolio is worth a look btw) I think the mindset to take on here is that you haven’t arrived at the point on your artistic journey where your style is clearly defined and that’s totally okay. Many professional artists say that they feel they didn’t have a "style" until years into their career. Think less on marketability and more on connecting with your creative roots. Which of your styles do you like? What resonates with you the most. Focus on that and that is where your best artwork will come from, and your style with it.