MashAllah! Congrats on the buy!
I myself imported a 5-grade Vitz KSP-130 last year. I did some research on which size of rims and tires to install. My research led me to the conclusion that 185/60/R15 is the ideal choice of tire size. However, for this particular size, the maximum allowable width rim was no more than 6-inches. I see that you have opted for a 7-inch width rim, please do share if u have faced any problems.
I went for 185/60/R15 Yokohama C-drives. they were very hard come by, especially the imported ones. They costed me an arm and a leg, but they were certainly worth it. For rims, i really wanted the Lenso's, but they were only availble in 6.5 and 7 inch width. Since i did not wanted those heavy chinese rims, so I went for Suzuki Swift's original rims as they were only available in my desired width, weight and quality.
Kindly share ur experience of changing the CVT Oil. My car is 35K driven now, and needs a CVT oil change. So please share the experience.