How long is the class? If it's more than an hour than perhaps, considering your boxing background some things might migrate over can be good or bad, I'd have to say you'd need alot of at home practise and also you should note that gains won't be seen no where as quickly as in the ring. Also, sparring using Aikido generally doesnt work due to sparring rule limitations so dont get frustrated if you start and you do happen to spar and it all goes to crap.
Also, you'll love the Aikidoka atmosphere its like a big welcoming black hole that sucks you in where almost everyone is friendly and willing to share "secrets" so to speak. Love it me self.
Goal:Enshin Honbu Dojo