Thank you everyone for your replies! It is so refreshing to hear I am not the "odd one out", but in fact, it's a lot more common than I thought. Although of course I wish I would have gone to grad school straight out of undergrad because of age reasons, I am so glad I didn't because I indeed gained a lot of maturity and experiences I otherwise wouldn't have. I now feel much more certain of my goals and have a mindset of "whatever it takes" to accomplish them.