Welcome aboard. Sorry to hear about the Altima.
As for transmission, the A10 is supposed to be a thing of beauty. If you learn to drive stick (which anyone can do) it is a driver experience like no other with a sports car...that and you'll be better prepared for the Zombie apocalypse!
Ultimately, I'd say be honest about your personality and needs. If you do A LOT of commuting, and bumper to bumper traffic, than get the Automatic. If you don't, and have some fun twisties between home and work, then by all means get the manual.
Have the dealer or a friend teach you. Years ago, I bought my first V8 Camaro, and insisted it was manual. The dealer taught me in minutes. The trick to remember, is with an automatic, you drive with your right foot. With a manual, you drive with your left foot. Best of luck.
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“Yeah, well, you know, that’s just like, your opinion, man.” - The Dude