How do I place an affiliate link on my website or on a website?

How in the world do you do that? I am an complete newbie when it comes to things as this.. Hearing this is like hearing sign languages. I don't have an website of my own . I am joining most affiliate programs that don't require me to have an website.

OK! Instead of going through further details, I would request you to create a free blog at blogger.com Once done, you will gradually get to know it as all of us have learnt by exercise.

So, what you are saying is, that I can create a blog for free, and I can use this like I would use an website? So, that means that I can embed HTML codes into my web page.. ??? So, if I am asked my website URL when signing up for an affiliate program, do I give them my blog URL address? I have no clue on how to write up a a blog. Do, I need an domain name? Do I pay for any hosting fees? I know that when doing a blog you are supposed to write about what you have an interest for, but, I have no clue on what is my interest.. I am so new to this. It all is very confusing to me.. It is going to take a lot of studying before I can perform this.. If, I can get help, then maybe it won't be so hard on me..