On the whole I’d go with about 50% though much more on the paternal line than the maternal line.
There’s a vast amount of scientific literature on this point, but as often the case a good start can be made on Wikipedia.
The Khazar and German origins you favour are wholly debunked, of course.
https://en.wikipedia.ORG/wiki/Genetic_studies_on_Jews
Relying on 23andme and similar commercial sources places reliance on the pseudoscience typically adored by the NAzis.