First of all, Bitcoin isn't anonymous. Second of all, if you aren't comfortable with the requirements that the site requires to you as the user then better find another one which will require less for you.

It isn't ignorance at all since you are just a newbie (I assume) and this is part of the training session that you will undergo. One advice, if you aren't comfortable with it then better find another site or exchange. There are some exchanges or sites which doesn't require KYC or if they will require is at least they will not ask for too much information coming from you.