People seem to put a lot of emphasis on finding a “style” when it comes to illustration, something that will make you stand out from the rest, something that is recognizable as being yours only. This can sometimes put a lot of pressure on new illustrators to develop their work rapidly and often doesn’t leave much room for exploration.
I remember expecting to find my style basically overnight when I was first getting started, but nearly 3 years later I still feel my style developing and shifting as I explore new mediums, new concepts and practice over and over again.
In my opinion, your illustration style will actually develop quite naturally the more you let go of it. If you’re feeling stuck, pick up some good old paints or some inks and allow yourself to explore and experiment like you probably did as a child. This is a great way to find new techniques and little tricks that will serve you and eventually contribute to your style.
Having a unique illustration style is great and will help you stand out as an illustrator, but it’s best not to rush the process and let it happen organically. If you’re new to illustration I would highly encourage you to learn to draw things well before you work on your “style”. I think you’ll notice that as you go there will just be a certain type of way that you seem to naturally draw or paint and that is just the beginning.
Overall, not overthinking your illustration style will allow you to explore different ways of creating which will ultimately help your style develop and evolve. Nothing happens overnight.