I read your question.
As for the answer to ①, I think it is necessary to study other religions as well.
Do you know a religious person named Daisetsu Suzuki?
We are insanely famous people in the Zen world, and when we were young, we published a book introducing the characteristics of Mahayana Buddhism to Westerners.
However, a world-wide religious figure at the time said, “It's completely different just because you arbitrarily think it's Mahayana Buddhism. Rather, it is an idea close to Hinduism.” It was pointed out, and it was criticized quite badly.
Since then, Daisetsu Suzuki also continued to refuse to resell that book, so it was probably black history for him as well.
In the end, my own answers took precedence, and I think I studied to flesh them out.
If I had properly compared it with other religions, the content would have been a little different.
Of course, even if I only study Buddhism, I don't understand the characteristics of Buddhism.
By comparing it with others, the characteristics of Buddhism come to light.
To that end, I think I must first thoroughly study Buddhism.
Otherwise, it would get mixed up with other religions.
The answer to ② also respects the ideas of other religions.
For example, it's common for my friends to like red even though I like purple.
Just say, “You're wrong!” It's not like that.
“Wow, that's right. Red is good too, isn't it?” I think so.
However, I still like the color purple.