You're so pretty! I'm so jealous that you look that good with just mascara! Congratulations on your graduation, btw!
If UD Half-Baked works for you, then it sounds like you've picked out some good choices. However, if you already have the UD Naked palette (the original), a couple of the colors you've picked are clones from the palette. Trouble, Loaded, and Caliber are clones, corresponding to Virgin, Toasted, and Half-Baked itself. If you want to replace your "mainstream" colors (many do!), then the Naked clones or the set is a great choice. Naked 3 also seems to be good for green-eyed girls - here's a link to Phyrra's comparison of the UD palette and the Silk Naturals clone. Phyrra mentioned on here that she really likes this palette for your type of eye color! http://www.phyrra.net/2013/12/silk-naturals-vs-urban-decay-naked-3-dupes.html
This is the thread about it: http://host.silknaturals.com/forum/viewtopic.php?f=3&t=4481&start=10
I've also heard purple works really well (on most eyes, really) - there's a wide variety to choose from. Something like Sari or Jump if you want a more muted color, or something like Siobhan, Vivid, or Howl if you want something brighter!
For lips, Mirabelle is a bit bright (on me, anyway, but I'm pretty pale - I wear the #1 concealer and the N10 foundation from here) but does fit pinky-peach. I love that color as well, so I can suggest Clandestine, Foreplay, Frenzy, Pretty Please, and Ginny. The only one of these I don't own is Clandestine. (At least I think I don't...I have a lot of SN lippies!) Foreplay and Frenzy are rather sheerer and not as brightly pigmented, so if you want something more subtle, those are good. Both shimmery. Pretty Please is the minty, plumping ALG formula. Also sheerish, but still pigmented. It's not too minty - not like Buxom glosses, which can downright hurt.
For a nude lip, many people like the cool, plummy nudes like All In, Five Star, or Strut. XXX is an opaque lipstick that's pretty much concealer for the lips, depending on your skin tone. I'm pretty sure it would be brown on me. Modern Poet is my perfect nude, since I like a very pale nude lip with a bit of pink and no overly brown tones. Birthday Suit looks like a reddish brown on me. Nice Tan is probably a good one to start with, or Maiden, Cultured, or Negligee if you like them pinker. (Maiden and Negligee are clones of MAC Slimshine Bare and Velvet Teddy, respectively).
I'm sorry for the extremely long answer (I always say this!) but I hope something helps! Welcome to SN!