Install Debian 32 or 64 bit, on weak hardware with a lightweight desktop environment

I'm planning to install a Debian 32-bit or 64-bit if possible. It is a Toshiba Netbook NB305-N410BL-bn The mfg specs list my Intel Atom® Processor N450 512K Cache, 1.66 GHz as a 64-bit processor https://ark.intel.com/content/www/us/en/ark/products/42503/intel-atom-processor-n450-512k-cache-1-66-ghz.html#tab-blade-1-0 The computer specs show it as a 32-bit running windows 7 starter. I don't know if this is the right distro, which installer, or if I should run 32 or 64-bit.