I recommend the following FAQs to anyone new to soulseek:
UNOFFICIAL SOULSEEK FAQ
OFFICIAL SOULSEEK FAQ
If you have any questions that are not covered in the FAQs ask them here, and I will try to help.
Tip: I find that the search function is not always very efficient. I suggest using the wishlist function in conjunction with search. Another good way to find files is to join a room with users who have similar interests and talk to the people there. I am always in the "Ayumi Hamasaki", "fra-foa", and "japanese music" rooms.
Download soulseek here:
http://www.slsknet.org/