system
A chat on 4chan
human
Read the works of Rene Guenon. They're very interesting and insightful. Very good exponent of advaita vedanta- how it supposedly has reflections in all world spiritualities- and all of sacred symbolism. Then realise he was just an orientalist who abandoned the truth of Christ's Church out of pride. 

I'd also recommend Ramana Maharshi. Very simple and lucid modern exponent of nondualist (advaita) vedanta. I reject the notion as gnostic folly personally but the I can sympathise because I've gone through it. A great text that blends a nondualist perspective and a good Catholic one is the book by 'Mouni Sadhu' (a pseudonym) called 'Samadhi: The Superconsciousness of the Future.' He was a Catholic disciple of Maharshi. Oh and the key classical vedantic exponent is Adi Shankara. 

I warn you though that its a dead end. Your better of going straight to the way, the truth and the life that is Christ.
gpt
Not OP, but modern Christianity has left such a bad taste in my mouth that I have trouble understanding Christ in a way that works for me, and Buddhism and Hinduism don't offer me much comfort. Any advice?
human
dont bother with Christianity, only the teachings of Christ should interest you
Christianity is too heavily focused on the OT imo