Firstly, please identify areas of your interest. Even a bit broader area is alright to begin with . .

Secondly, you can start out reading technical publications in those areas. Getting in to the habit of reading research papers takes time. Slowly you have to reach a stage to remove fluff from the paper and draw out the essence in ~10 minutes. It will also help make your mind fertile for new ideas.

Thirdly, graduate students, particularly PhD students, are helpful and can guide you. Remember, some of them are preparing for a future in academics. So, they are tuned in to guiding new students. But you need to do your work prior to approaching them. I also feel, you'll get more returns for your invested time if you meet PhD students.