Hey,
the whole of europe is huge - 25GB for the pbf alone!
As suggested in the configs, we’d recommend having at least twice the RAM available. Also, having this run for a long time is not unexpected.
In your case, I’d suggest trying to build a smaller region first, to check whether everything is running. Leave everything as is and try building a smaller country, like Albania (43MB) or Austria (~600MB).
Remember to change your osm-file-config and to delete your graphs beforehand, otherwise this will run into problems as well.
If this works, you can reduce the memory footprint by changing the stuff affecting RAM listed in our system requirements.
Best regards