It'll change you somehow. I tripped last night actually, tripped pretty hard actually. I've done it around 40-50 times (I've lost count at this point) in the last three years that I have been taking psychedelics though, and I will say that last night's experience changed me as did the other 39-49 times I have done them. Each time you trip, I believe that it provides insights and changes in perspectives that change your outlook on life somehow. Personally, I find this aspect of psychedelics the most beautiful and wonderful thing about them. However, if you are afraid to change, then I don't recommend psychedelics. Because in some way, somehow, psychedelics will change your outlook on life. Not like "it changes your brain" sort of thing or anything like that of course, but a trip gives you a new perspective on life. Like magic almost IMO. I think it's a misconception that psychs automatically make you view "everything in a more spiritual way" for all of your life. I believe that psychedelics are spiritual, but when they wear off and life goes back to "normal" whatever that means, you just are your normal self....... yet you get new information and a new perspective on life that you wouldn't have figured out "on your own". Though, IMO, the whole thing is figuring it out on your own in a new and fascinating headspace rather than the "drug" forcing something on you (I don't consider psychs drugs but rather tools for personal development that yes some folks take who aren't ready for). If you aren't interested in becoming a "shaman" or "monk" as a result of your psychedelic use, it won't magically turn you into the next spiritual guru lol. But yes, it will "change" you in some way due to a new perspective.
This is going off my experiences with psychedelics. So, I don't know what it will do for you specifically. However, I highly doubt that you'll do psychedelics and then suddenly turn into someone you're not (e.g. some sort of "hippy" sterotype). IMO, psychedelics just make you a better version of you. That's what it did for me, but I'll say if you're nervous about taking then because of fear of what you'll "become", it might be best to hold off for a bit. The drug won't make you anything that you aren't, trust me, but yeah it'll change you. As making you what I feel is a better version of yourself.
Sorry I can't really explain it, just something that's different for everyone and defies explanation TBH. Take psychedelics if YOU feel you're ready without asking anyone to, IMO it's just something that you feel in your bones that you need to do and want to do..... and in your head unconsciously KNOW is right for you and you WILL know when or if the right time is for you to take them. For me, it's the same every time, when I trip, I feel in my bones and my soul that it is THE time for me to do it. It'll be the same for you, psychs come to you, you don't go to it. I know that may sound strange and not make sense to some folks, but trust me that's just how it is IME. Your mileage may vary and not only are psychs different for everyone but how everyone comes into them is different as well. Everyone comes into psychedelics in a different way.
TBH, as a firm believer in God and the supernatural who has always been a believer in the supernatural, I don't know firsthand how a non believer would experience psychedelics. Howver, despite the fact that I find my trips to "connect me with a greater power" that's always somewhat vague and ambigious as other believers in God who trip have described, my friends who are atheist/non believers in the supernatural have not changed their views as a result of their experiences. For me, when I trip, I'm connecting with God and the spirit world....... when my atheist friends trip, their connecting with something that I never have as they have a different religious/spiritual belief than I have. Yet nope, psychedelic trips didn't make them believe in God or change their religious beliefs in any way. Never have seen this occur. Not saying this is impossible. I feel that I have experienced supernatural things while tripping at times, and I have even experienced things like that while sober. But tripping never made me believe in something that I fundamentally do not believe in or entertain the possibility of (even on an unconscious level) while sober. So, yes they change your belief but only within your basic and fundamental framework IMO. That's just been my experience though and what I have gathered from having many convos with other friends who enjoy psychedelics. IME, it can be a beautiful and wonderful thing but only if you're ready for it. Just my 2 cents.