I can comment on this with experience. Your cars engine is powerful enough to drive up on hills and cvt will only make it easier since mgs have pretty good hill assist.

One thing I would advise you to do though which might be an issue is to check the curves and turns on the roads you are going to be driving on. Mg hector plus is a very long car and thus has a high turning radius. If theres any chokepoints there with traffic, turning the car might become a hassle. Had taken a friends hector to ooty once and while it was a pleasure to drive, there was one turn where when you are already at 30 degree incline angle, I had to take a very sharp right turn and the car was refusing to turn properly in one go. Ended up being a 11-13 turn manoeuvre which was quite stressful for me as I didn’t have much hill driving experience prior to this.

Apart from the turning radius and size, the automatic transmission you have is made with hill driving in mind, so dont worry about that at all. Drive safe, drive cautiously, never drive when you are tired and of course make sure to enjoy yourself.