If i may advise you that you should first take a step to google search what is bitcoin on the internet, you will receive many feeds from different sources and then try to read the ones you can quickly understand just to get an idea of it is, do same to blockchain and then come back to the forum to learn more from bitcointalk which is the bitcoin official discussion forum, we have many boards that relate on bitcoin discussion, read through them, learn and with time you get used to it, even if we are to explain bitcoin to you we can't give you all you needed to know at once except you make your personal findings through learning more over time, just be patient and be active on the forum while learning.