You can start your research right here on the interenet my friend. Just go do a google search on your topic, which in this case is courier and see the results it pulls, better still, put qoutation marks around it and if it's Tampa Bay you will only want to opereate in, which maybe wise to beging with, inculde that in your search term so it looks something like "courier services in Tampa Bay". You will onviously find there are a lot of these kind of services in your area which is good for it simply means there is demand for the service you would like to provide.
Check what other companies are doing and their pricing and all, you even be able to find someone who can coach you in that area, or just phone them up as a customer and ask the questions you wold want to know.
This resource will give you some ideas, just visit:
http://www.supersuccessformula.com/a/Making_Money_Online_Made_Easy.html