Manjaro can run on low spec hardware - but as the ISO is quite large - even for the minimal edition - you will need to do a commandline install.
You can either use this guide
Or you may try the manjaro-architect package on the live iso.
When booted to the live iso - open a terminal and run
sudo pacman-mirrors --continent
sudo pacman -Syy manjaro-architect
sudo setup
NOTE on using -Sy: Generally you should use -Syu when installing - but as this is the live ISO it makes no sense to run a full system sync - we only need the package databases.