You are so young, there is no reason for you to be trying to fit your degree to a specific career at this stage.
Some people don't really care what they study as long as it will land them a solid, well paying job afterwards. So they go and do accounting or some shit like that.
But you are not like that. You want to experience the world in new ways and have knowledge to become a different and better person. I wholeheartedly endorse that and I think it's great, and it's what study should be. What that means however is that you don't need to be thinking about careers right now.
You need to be in an exploratory mindset rather than a goal oriented one. Take a lot of different classes and see where your aptitudes and interests lie. Considering becoming an academic before you've even set foot on a university is not going to get you anywhere and is a waste of time. I'm doing a phd right now and on the road to be coming an academic and it's a decision I made after I had been at university for more than two years. It took three more years of undergraduate study, and a year of phd research to get where I am now, and I still have a serious way to go before I make it to academia. You have plenty of time, you are really young and you need to explore what different areas of study have to offer you.
So don't avoid taking philosophy because you don't want to be a professor. Just take it, and a bunch of other stuff, and see where you go.
ps: Seriously, shelve the entheogen idea...no university is going to teach you the ways to reach enlightenment through drug use, and if you get too far into that shit you will not succeed in your studies because you will be too wacked out. You will get over the drug thing, and there is not an academic discipline in the world that can really teach you how to better understand what you are wanting to understand. Neuroscience, psychology, pharmacology, all of these provide different perspectives on how drugs influence the brain, but as to how we can use them in a positive way for ourselves? That's outside the academic realm. Plus you'll get over the drug thing eventually and when you do you'll regret structuring a degree around an interest in drugs. Jeeze, I sound like such an old man don't I?