Since you cannot run official Chrome OS on 32-bit hardware, here are the top three options. Each gives you a secure, fast, browser-centric experience.
Starting with Chrome OS version 71 (late 2018), Google completely dropped 32-bit builds. The last Chromebooks with 32-bit CPUs (like the Samsung Series 3) stopped receiving updates in 2019. Chrome Os 32 Bits Iso
Chrome OS Flex (the free version for old PCs/Macs) is also . You can download a USB image from Google, but it will not boot on a 32-bit CPU. Since you cannot run official Chrome OS on