how do you say "Let's talk about colours" in chinese answer in pinyin please

how do you say "maybe i will go swimming later" in mandarin (answer in pinyin please)

did i write that correctly in pinyn Zuótiān wǒ kànle hěnduō zhōngguó diànyǐng (yesterday i watched a lot of chinese tv)

Nǐ zuì xǐhuān de yánsè shì shénme (what is your favourite colour) did i write that ´correctly ?

How do you say " i almost understand what your are saying" in chinese