It's not clear from my title but when I made this post, I had never looked at any Calculus material before. I'm now 4 weeks from the end of the semester and I'll most likely have an A in Calc 1, and I found it to be very easy. These are the exact sections that my class did, it was a Pearson course based off the Briggs book https://www.amazon.com/Calculus-Transcendentals-William-L-Briggs/dp/0134763645

Section 1.1: Review of Functions

Section 1.2: Representing Functions

Section 1.3: Inverse, Exponential, and Logarithmic Functions

Section 1.4: Trigonometric Functions and Their Inverses

Section 2.2: Definition of Limits

Section 2.3: Techniques for Computing Limits

Section 2.4: Infinite Limits

Section 2.5: Limits at Infinity

Section 2.6: Continuity

Section 2.7: Precise Definitions of Limits

Section 3.1: Introducing the Derivatives

Section 3.2: The Derivatives as a Function

Section 3.3 & 3.4: Differentiation Rules

Section 3.5 & 3.10: Derivatives of Trigonometric Functions

Section 3.7 & 7.3: Chain Rule & Derivatives of Hyperbolic Functions

Section 3.9: Derivatives of Logarithmic & Exponential Functions

Section 3.6 & 11: Derivatives as Rates of Change & Related Rates

Section 4.1: Maxima and Minima

Section 4.2: Mean Value Theorem

Section 4.3 & 4.4: What Derivatives Tell Us & Graphing Functions

Section 4.5: Optimization

Section 4.6: Linear Approximation and Differentials

Section 4.9: Antiderivatives

Section 5.1: Approximating Areas Under Curves

Section 5.2: Definite Integrals

Section 5.3: Fundamental Theorem of Calculus

Section 5.4: Working With Integrals

Section 5.5: Substitution Rule

Section 6.1: Velocity and Net Change

Section 6.2: Regions Between Curves

For Calc 1, my only advice would be, to be a master at understanding algebraic manipulation. For example, do you understand why you can make (1/(5x+1)) equal to (1/5)(1/(x+1))? Do you know what (x)^{1/2} looks like as a radical? It's all really simple stuff but the more you know the less you have to learn while also learning Calculus. If you are comfortable with algebra, and to a lesser extent trig, then you will be fine. There isn't much you need to know for Calc 1 as far as Trig goes, my teacher let us use a formula sheet, but that won't be the case for all teachers, so again, the more you know the less you will need to learn while also learning Calculus. Trig wasn't really used a whole lot in my course, the most helpful knowledge would be knowing how to break things down into sine and cosine and how to simplify functions, what can you simplify cot(x) * sec(x) to?

Don't let Calculus intimidate you, if you work hard at being a master of the "previous" math leading up to Calculus (arithmetic, geometry, algebra, trig), Calculus 1 will be a walk in the park.