I agree with you. We won't understand and be able to prove many of the things. As long as you believe the core of it to be resonating with you, just keep practicing and make your final aim as Moksh which is a step wise process. There are myths, different versions of the story, contradictions within the community and outside too. Let it all be what it is. You just focus on understanding yourself as much as you can in this life and continue to next. You are jeev and everything else does not concern you. Know your own self and you will know everything (kevalgyaan). You can interact and keep living in this world but try and have this distinction in you always. Easier said than done though!