Yarn and Fabric related

Hi Ladies I want to try something I have'nt tried before in crochet and that is changing colors to form a pattern in rows. The pattern is here (you do have to download it to see it). I do hope I'm not doing the wrong thing by sharing the link to the pattern If I am please tell me.

it's here

https://www.yarnspirations.com/lily-botanical-crochet-dishcloth/SCC0512-030572M.html?cgid=patterns#prefn1=patternProjectType&prefv1=Dishcloths&prefn2=patternSkillTypeString&prefv2=Crochet&prefn3=patternSubCategoryRefinement&prefv3=Holiday%7CHome+D%C3%A9cor&start=2

What I want to know is when it says

Work Chart, noting each square of chart is equal to 1 sc and reading RS rows from right to left and WS rows from left to right. Carry color not in use across top of entire previous row and work sts around it. This will ensure even gauge as all sts will be worked around an extra strand of yarn held across top of previous row. Carry both colors up side of work. 1st row: (RS). 1 sc in 2nd ch fro

Should I be writing down when I'm on a WS or RS, I'm gathering the first row is the RS?? and I read the chart according to what they say. Also

do I just hold the previous color yarn with me and stich over it on the back when it says carry the yarn?

Sorry for all the stupid questions I've been wanting to try this and I love dishcloths and foliage so it's perfect for me.

Thanks for your help xx