I think she said he was 23 months.
Regardless of which way your seat will be facing, I strongly recommend you sit down with it one day (perhaps when ds is napping and you have an hour or so to figure this out in peace) and become familiar with its features and those of your vehicle. I would hate to think that some time there could be some emergency, switch of vehicles, or whatever, and you might be clueless and completely stressed about having to install that seat yourself. If you find a good tech, he/she will not only install it for you but teach you how to install it yourself. I would play with it and practice installing it RF, FF, and with Latch as well as the seatbelts. It's really important that you learn how to do it yourself. And then, when you decide on what your next seat will be, I'd become familiar with that one and learn how to install it as well.
I hope you find something that works for you and gives you peace of mind.
I'm really glad that you are seeking out answers to your questions here. This is a great place to start! :thumbsup: