Hi Rocal .
i have the 11' glide and a 11' Nalu .the glide is a bigger board for sure .hard to fall off ,I ride small waves ,only go straight on it .it is 33" Wide ,so stable .i take it in ocean and lagoon areas and when it is very rough and don't feel like falling off or getting wet .it tracks great . The 11' nalu is more or a all rounder ,more waves and paddles nice too .I think the 11.4 paddles better in flat water due to less rocker and thinner @ 30 ' instead of 31' like the 11' Nalu .but I got the 11' Nalu for waves .you could also be very comfortable on the 10.6 ..with your weight 56 kgs .Im 96 kgs .If you do want the bigger board the 11' glide or nalu s would fit the bill.if you need it for waves as well go for the nalu's .
Most girls love their 10.6 Alanas ..= 10.6 Nalu .it is rated to carry a 90 kg person ,you will be fine on it .
you will find it easier to carry too .

Tardy