Local support is nice but not essential as long as it’s a major brand you’ll be able to get whatever you need from the internet suppliers. I’ve found Tony Kart to be the most forgiving if your not familiar with chassis tuning. Works well with my 13 year old because it’s hard for him to figure out what the kart is doing and wihout good input tuning is tough. I like DR / CRG same chassis with diffrent clors and graphics but DR costs less. I like them because they’re common plenty of support no matter where you are and I like the sniper front end adjustments.
If I were you I would definetly want a front porch extension. Your height and weight might make it difficult to move the seat forward enough to get good balance and enough leg room. A 32MM DR J90 with a front porch extension would be my choice.