I'm now looking for a course that can help me take my tech skills to the next level and develop a "hacker mentality" I don't think you can really 'teach' these

I'm now looking for a course that can help me take my tech skills to the next level and develop a "hacker mentality" I don't think you can really 'teach' these things, certainly not in a 'follow these lessons and then you'll be a hacker' sense. Developing a hacker mentality is something that you need to practise and 'live'. Rather than looking for a course you should be looking for a mentor.