It is not too late. I know how you feel, but it is not too late - if you do not start asking questions, then it will be too late one day because they won't want you anymore. Of course, it is MUCH easier to ask the right questions on day 1, and with passing time, you become more and more reluctant to ask questions, but, as someone mentioned earlier, it takes 6 months to be comfortable in a new position. Since 6 months have not passed, you won't look bad if you ask questions. But before you ask, figure out how you will remember the answer. Will you repeat it back to the person? Will you apply it (do what was explained) right away and remember that way? Will you write it down or send an email to yourself? I am asking these questions because if you already feel awkward, you would feel even more awkward if you ask a question but do not remember the answer and have to ask again. So please figure out based on how you learn better what you will do to make the best use of the explanations.