I see that Duolingo has been mentioned a couple times here already, but those topics didn't get much response, and things have changed a bit in the past couple years.
, you start out learning and translating simple phrases and sentences, then work your way up to longer texts. The process is kind of "gamified" in that you earn points and things as you go along. They also can send you reminders to practice a little bit every day. I think Duolingo would be a good way to learn Lojban – certainly, the interactive courses are better and easier than studying flash cards by yourself.
Duolingo is free, and the content for new language courses is generated by the community. They've recently added other constructed languages -- Esperanto and even Klingon -- so if enough of us express interest, there's no reason we can't have Lojban be part of the list. You can go to the Duolingo forum
to talk about adding Lojban and if you know enough to help, apply here.
I really think this would be a good idea because it would give Lojban more exposure, and help new people learn in a more interactive way.