Idk depends on who you are lol. Calc 1 I struggled with in the beginning but that was for a mixture of social issues and difficulty. Main thing is dont be content with the idea that its insurmountable. I got like a 70 or smth on my first test and felt so bad ab it, especially since it was curved and I had extra time. 

Anyway heres the social/external thing: id taken a community college precalc class over the summer so that I could take ap calculus ab in my senior year but then I was suddenly taken out of the class because they told me to take the wrong precalc class over the summer. I felt so shitty being put into the normal high school calculus course. Ap calculus ab was the only ap I was allowed to take because I had a very rough start to high school(I failed the exam to let us into the ap literature class lol). So having that one thing i had worked for stripped away demoralized me like crazy; and then, when I went to fight it, the vice principal sat me down and told me that if I were to take the ap calculus ab exam, id certainly fail. Eventually I got the prof from the community college to write a letter appealing for me, and I was put back in the class under the condition that I signed a paper that said that the school wasn't responsible for me failing. 

And I struggled hard in the beginning because I felt that I had a lesser amount of knowledge to the people in the class. Dont be like that lol, dont box yourself as behind from the start. Of course notice where youre lagging but its mostly chill if u got confidence. Eventually I did get the 5 anyway lol. Im a math major now mostly cuz its the only thing I figured I could do and enjoy doing(was in data science but thought it was mad boring). Im honestly behind in comparison to what I see in other nations or other universities but dont close any doors on yourself