i need to have some work, but i am yet a student. so i can’t do a full time job right now.

but i am good with seo things such as link building, etc etc.
where can i get some good projects like these, which can pay me by paypal or something like that?

freelancer jobs are for people, just like you, who want to work, but cannot work full time due to one problem or another, i suggest that you start to take small projects on various freelancer project sites.

that way by the time you are out of college you already have an impressive resume as well as experience and contacts which are going to be extremely beneficial for you in the long run.