RE: Career change for newbie
NetSuite is pretty user friendly and has a robust Help section. You need a position with a company that uses NetSuite and grants you a user account. You could search for an accounting job in AR or AP. There is an increasing number of independent training resources on NetSuite such as https://leanpub.com/u/mattdahse. NetSuite training tends to be proprietary so learning on your own will be a challenge.