I don't know if hobby lobby carries them, but I'm a big fan of Privateer Press' P3 line of paints. They have good coverage, take dilution well, and if you want to wet-blend or other fancy stuff they do that nicely as well. Vallejo Game and Model color are nice also, and I use all of them quite a bit. I know most gamers think Games Workshop are the Devil, and they're not entirely wrong, but his dark majesty did gift us with GW washes, and they're basically talent in a bottle. I'd reccommend those to any painter of any skill level and let them see how simply and easily they can take an average paint job to the next level.
As to your color scheme, P3's Cygnar paint set wouldn't be a bad buy- you get 3 shades of blue, from dark to light, a nice tan, a dark gray and a yellow. It's considerably cheaper than buying all of them seperately. P3 Pig Iron is a nice dark silver metallic color, good for picking out gun barrels or other details. You can't go wrong with a good black paint, and I've always liked Testors Model Master acrylic Flat Black. It's super thin right out of the bottle, but still covers well.
Since I just professed my love for them, I'd also suggest getting GW's Nuln Oil Wash (black), Drakenhof Nightshade (blue) and Agrax Earthshade (brown). Even if you don't get anything else I've listed, I'd strongly encourage you to pick these up and try them out. They're really that good. If I had a time machine, I'd deliver a case of GW washes to my 14 year old self with a note that says "Don't sell all those BTech minis in '93, you're really going to regret it" and it would suddenly become the best timeline. ;)
As to the cockpit, if I were to do one in green, I'd probably go with Vallejo Game Color Dark Green, VGC Sick Green, and VGC Goblin Green. But, that's just me.
Good luck, and remember the number one rule of painting: If you're happy with it, then it's a good paintjob. :D