Welcome to the Lexus owners club and Festive Greetings to you. You have a ordered a fantastic car and I wish you happy motoring when you get it.
1 Lexus has a limit of 7Kw as far as I am aware.
2. Infotainment system is relatively straightforward but I am sure the dealer will pair your phone. The Lexus Link app isn't the best however and as far as I am concerned the disappointing feature of the car. Make sure the latest software update has been done.
3. I actually find the Lexus navigation OK and clearly displayed on the HUD etc. Don't think it shows charging points however. Others will promote Android Auto but whilst it is superior I only use the Lexus system.
There is much to learn on the day so just take time to become familiar with the basics. It's then a case of self teaching of the more advanced features. It will soon become crystal clear!