If you had spent some time at Sun's web site,
and bothered to research the issue a bit before just plowing ahead,
you may have prepared yourself for this.
Begin with the Hardware Compatibility List to see whether your hardware
will even function on Solaris: http://www.sun.com/bigadmin/hcl/
Then memorize the Download and Burning Instructions:
http://www.sun.com/software/solaris/download_instruction.xml
Then review the Basic Installation Instructions:
http://docs.sun.com/app/docs/doc/817-0544/
If your installation isn't successful the first few times,
I suggest you just do it all over again and again and again.
You will learn from the experience and eventually become comfortable with it.