I have different series of books and they have covers that look similar enough that students generally know where to put them. They actually do a better job cleaning in a shorter amount of time than I do, because of the teamwork.
I don't know how your classroom is set up, but there is usually minimal chaos in my class as students choose books they read then keep it in a folder which is in a basket near their desk. I set it up this way so they can finish their own chosen classroom books later and don't have to keep going to the library and shuffling books around. When they finish the books they have already chosen, then they put it back and find new books (or I assign to them).
It's part of the Daily 5 framework (https://www.amazon.com/Daily-Fostering-Literacy-Elementary-Grades/dp/1571109749) I have during my literacy blocks.
You'll likely have a curriculum provided by the school. Go heavy on the phonics within the curriculum. Don't sweat the spelling, however, learning to read takes primacy over learning to spell. If you must do weekly spelling tests, then link them to whatever the phonics lesson is for that week.
Literacy circles are really big at this age. It's a way to design your class so you have 3/4 working independently while you deliver small-group, targeted instruction to the others. The Daily 5 was a great tool for helping me learn how to manage this. Fountas & Pinnell were also really helpful when I was learning how to design literacy circles, but they pushed me in the direction of whole language/three-cueing when it really is all. about. the. phonics. Still, they were super-helpful when I was just beginning to teach and struggling with class management and literacy instruction.
Read alouds are huge at this age (well, in 8th as well). Elephant and Piggie, Mercy Watson, Frog and Toad, Dragon Masters are all books that are both appropriate for 1st/2nd to read aloud on their own as well as have read to them as a class. A lot of your struggling readers are going to gravitate to Elephant & Piggie because the text is really easy for them to remember after a read-aloud (and because it's fun). Scholastic Branches books (including Dragon Masters) will be perfect for your high first and on-level second graders.
Feel free to ask more questions as they come up.