Okay that's cool.. I wonder.
Reason: I also took Biology in 12th to have knowledge about the biology.(But i was sticking with PCs :D )
So If you have real interest,then nothing can stop you.
1.If you want to get placed VERY quickly, then i would recommend RHCE or any other Redhat based certifications. (If you have deep pocket go for this)
2.If money is the trouble for you, then go for COMPTIA based certifications,since they can be self-taught and also the exam fee is less.of course, Redhat also can be learned by yourself,but when it comes to exam you have to pay around 15k to 20k*
Also NO basic is required. But if you have some,then it will be great.
BTW,which OS are you using?
P.S : Linking doesn't work in visitor messages so im posting the link here.
http://www.redhat.com/training/courses/ex300/