So why don't you ask your senior brother how he ranked up? If I understood your reply properly, your brother is a Senior Member on Bitcointalk. Unless he only got airdropped merits, he should be able to guide you if the advice the other users mentioned in this thread is not enough.
I think that when he said "senior brother" he actually meant any veteran/more experienced member of the forum, and not his own brother.
With that being said, I don't think that he is genuinely interested in ranking up as it's been almost 3 weeks since he started this topic and he hasn't been online pretty much since then. My guess is, this is just another merit fishing attempt (and pretty bad one I must say), pretending to be a newbie and asking most generic question possible. That failed, no one gave him merit so he abandoned the account. Rinse and repeat.
