Hi! Welcome!
Sorry I'm late to the conversation (since you posted a reveal already!!), but I'll leave this post up for others...
In any case... here are a few things to consider about a "first Dior".
There are 3 frequently travelled avenues for building a Dior collection, here on TPF. The pochette route, the Panarea tote route, and the Lady Dior route. Although there are ladies who chose other styles (i.e. one of the flap style bags, i.e. Miss Dior, or large non-cannage totes, i.e. Diorrisimo), those three are very common selections for first Diors.
1. Pochette - the pricepoint is "reasonable" for leather
and exotics (around $2,000 USD & under); they transition well from day to evening
2. Panarea - the pricepoint is reasonable for a large coated canvas tote (under $1,500 USD); a relatively "easy" transition from other brands, i.e. LV Neverfull & Chanel GST fans
3. Lady Dior - an iconic, structured, timeless tote that often transitions from day to evening
RE: Care/leathers
My favorite "carefree" leather was a matte calfskin that was available a couple of years ago. It was prominantly featured in editorials as a Lady Dior with bow and fringe details.
Nevertheless: Commonly available materials for Dior handbags include coated canvas, lambskin, calfskin, exotics (python, crocodile), etc. Hardware commonly available is silver or light gold. Although the most recent runway (S/S '12) showed tonal hardware (i.e. pink Diorissimo w/pink hardware).
Depending on how you prefer to use/store/maintain your handbags and how you prefer your handbags to age (i.e. patina vs. look new for as long as possible; slouchy/floppy/soft vs. structured), you're going to gravitate towards different bags.
So... feel free to share more ideas to narrow down your search. Or... look through the Celebrities thread or the Diors in action thread... or watch a runway show or two for some ideas.
HTH & Good Luck!!
p.s. Just found your reveal.

Congrats on your purple patent LD!!