Hi Jorge,
Welcome to openSUSE and this board. I’m afraid 1G may not be enough to run such applications. If I get it right 1G seems to be mentioned as minimum requirement - but that should be the absolute minimum. 1.5G is required when using online repositories, 2G is recommended.
https://en.opensuse.org/Hardware_requirements
Just for comparison, I am currently using 1,69G with just KDE Plasma, ksysguard and firefox running:
**pluto:~ #** inxi -m
**Memory: RAM:****total:** 7.65 GiB **used:** 1.69 GiB (22.1%)
**Array-1:****capacity:** 32 GiB **slots:** 2 **EC:** None
**Device-1:** ChannelA-DIMM0 **size:** 4 GiB **speed:** 2400 MT/s
**Device-2:** ChannelB-DIMM0 **size:** 4 GiB **speed:** 2400 MT/s
Firefox alone is using 200M. I don’t know if switching to some lightweight DE might help. More RAM would be better.
Edit: Have a lot of fun! Whatsoever! 