It might be me misunderstanding Buddhism to a certain degree, but what does the first question mean? Can you give some context?
Buddhism traditional says there are 84,000 teachings from the historical Buddha which many practices connected to each. For instance there are many different forms of meditation such as Soto Zen’s Shikantaza and Shingon’s full moon meditation. Within that context I’m asking what one practices. It could include ritual, scripture reading, mantra, meditation style, etc
What schools respect the “leave me alone and I’ll leave you alone” mentality?
I am unsure if this comment is in good faith or not but I would say no school takes this mentality.
That said there is an interesting practice described in the rinoceros sutra on the lone buddha or pratyekabuddhayana:
https://en.wikipedia.org/wiki/Rhinoceros_Sutra
https://en.wikipedia.org/wiki/Pratyekabuddhay
Essentially a buddha for themselves. This is typically not supported in modern Buddhism.
