Basics For Self-inquiry

[Dragallur]

Hi,
just today I started self inquiry. The only information about it I have got is from Leo's video: How to become enlightened: step by step process.
When I did it for 30 minutes today it seemed to me quite strange. I was asking those questions, "Who am I?" mostly. I have come to some "conclusions" or very small insights and I understand that in one day it can not be perfect (at all) but I wanted to ask for some tips on this technique, I read somewhere I think that it is good to focus on your sense of "self" and so on.
Thanks for any advice,
Dragallur