How to prep for Spivak

Hey everyone, I'll be starting my Econ+Maths undergrad this fall and wanted to know what to go through this summer to prep for my Honours Calculus class. For reference I just got done with my A-levels where I've taken Maths, so ive done some elementary Differentiation/Integration/Series. The course will be following Spivak and my only question is whether i should be going through single-variable calculus (It's a single course at my uni, rather than calc1+2) material first or just hop straight into trying to understand Spivak/adjacent material. Though, I should mention single variable Calculus is listed as an anti-req for Honours Calc. My only fear is I'll miss something basic that I'm assumed to have known before going into Honours Calc.

Author: George_noot_found