I have questions about identifying the defendant, who can I get to serve the defendant, and who do I get to collect on the judgement if I win.

I will sue for $10,000 in small claims court. The defendant does not have a business license so I am not sure who to sue. I am in Phoenix AZ and defendant is in Clark County running a table top boardgame store. I will do all of the paperwork but need guidance on determining who to sue, how to initiate any of the groundwork that needs to be in serving, filing, and collecting. The defendant is very clever at hiding his assets and is being sued by numerous companies. I realize an attorney can not present the case so I will do that.