Best bases to invest in today | Rookie coach wants to know

Ok I'm totally new to customizing/tweaking and all of that. So new that I haven't gotten any of the tools I've seen suggested on this site yet...the flat nose pliers, flat finger-nail clippers. I got some good lighters and a candle warmer(wifes) and an empty tackle-box so I'm well on my way...but what I really want to know is what bases should I invest in. I'm assuming I don't want to have a full team of just rookie bases. I imagine I'll be buying two or three base styles and creating a powerful lineup from multiple types. Could somebody help me breakdown if I need certain bases for certain positions. Remember I'm new, and I don't know abreviations yet, so please list full names of bases. Like I really don't know what an ITZ base or if that's even the right name for a base lol. Thanks.