I'm not sure how well this question will be received but, I feel there is no harm in asking. I'm 17 soon to be 18. I was in my applied maths course, but not anymore, not due to difficulty, but I can be quite impertinent at times and sometimes get over excited in class. but that isn't the point, my question is, where is a good place for me to start learning maths? I have recently started looking at matrix determinant and its really interesting, however, I'm not sure where to go now. I really enjoy maths, however, I've only been studying it for 2 years due to circumstances, so I am still naive in regards to how much I can actually do by myself. I'm sorry if I come across a certain way, I don't mean to seem rude or arrogant, I just kind of fell in love with maths the moment I saw it, and I've wanted to pursue it since, but I don't fit into school very well, and the curriculum is limited at the school I attend.
I appreciate any answer at all, so thank you very much anyone who toke the time to read this.
In your case, depends on your current level, you can consider
1) High school textbook in your country(if there is a standard curriculum or similar), if you are not familiar with it already.
2) If you're OK with high school level stuff, consider self-studying introductory level calculus/linear-algebra at college level. The textbook/curriculum of it should not heavily depend on country and location. Pick any textbook you like.
3) If you want to be a math major in college, consider studying a little bit real analysis/abstract algebra, although it might be too challenge for you now.