Softwareuopdates for MJ2016

Good morning together, We have bought a used XC90 Momentum D5 Momentum from November 2015 (MJ16), which we will receive next week. I’ll read a lot of newer XC90 which are now running on Android. As far as I can see up to now, however, it is still unclear to me how exactly this works for my MJ. I read a lot of newer XC90 which is now running on Android. As far as I am looking at it up to now, however, my system has an older (proprietary!?) system. Therefore, the question of how I can make which updates? Or differently asked: Which types of updates can I install myself and for which I have to become a dealer? Because the older system has an OTA update possibility – as far as I have reviewed it up to now. Does this only concern the infotainment unit? Or also the complete vehicle software? And how can I get navigation card updates? Thank you for your support. VG, mabuchho