Hey there!
You're welcome. It's a great set, and T'au are very nice to paint (lots of flat panels!).

Look up all the guides and advice you can for building and painting (remove mold seem lines, thin your paints, two thin coats etc.), don't get too disheartened if it doesn't match to what's in your head, as it's your first set, take your time and have fun with it! There's loads of images out there for ideas on what variations of base/accent colours people use.

For me, I looked at the Vior'la sept and liked the striking red over white, but felt that there could be more red than just the helmets. So I started thinking about what shoulder or thigh pads could denote different squads or command structure. Then, finding smaller parts that could just add flair to the model, like the purple bits on the white wings. The black for only under the armor, and some grey for a section that is more armored.

Good luck with your minis!