Hi Tina!
Did you start learning? Try Livemocha.com - there are serbian lessons there. Try to write a sentence, I'll be glad to help you and correct you.

here's some basic, to start:

I - ja
you - ti
he/she/it - on/ona/ono
we - mi
you - vi
they - oni

I am - ja sam
You are - ti si
he/she/it is - on/ona/ono je
we are - mi smo
you are - vi ste
they are - oni su

I am Tina - Ja sam Tina
My name is Tina - Moje ime je Tina (that would sound a little odd, people usually say: Zovem se Tina - roughly translated into They call me Tina.
I live in BiH - Živim u BiH.
I want to learn Serbian - Želim da naučim srpski.

Don't be discouraged by č, š, lj, nj, dž, ž, - you will learn them, just listen how people talk.

Good luck!