First, welcome to the site. I'm sure that there are books. There are utube videos and there is a sticky about don'ts for newbies on this site.
Check some sites like Jann's Netcraft, Lurecraft, Bear's Baits, and Barlow's for starter kits.
No it isn't cheaper. My first tube cost me $300.00 counting the molds, plastisol, glitter, colorants, gloves, and shipping. Of course the cost comes down as I make more but may never reach the level of store bought but I can have any color or combination that I want.