No worries about using a translator or English skills. It’s an international project!
I don’t know what version of Avogadro you’re using or what OS.
I’d first suggest installing a nightly build from https://two.avogadro.cc because it looks like a very old version and we’re about to release 1.100 soon.
You do need to install Python to use many features. We use Python scripts for many of the input generator windows including Orca. If you let us know what OS you’re using, we can suggest how to get Python set up.