This Operating System do i recommend for 32 Bit devices: ROSA Desktop Fresh and ROSA Enterprise Desktop
(the second one is only available via an email request and is based on the first one)
Both offer a elegant release model, which means: LTS Kernel, Systemd and so on, paired with a up to date KDE stack and applications,
same as fresh non free drivers and so on.
If only 1GB RAM is available:
Remove akonadi and the semantic search with urpme mariadb-server, to get a nice RAM usage.
This remove the search function for local files. Install the OS directly, live mode want at least 1.2 Gb free Memory.