Thinking about coming back to Destiny for Lightfall, what should I do for the next couple of weeks.

I used to be a hardcore Destiny player but I've been playing off and on for the last few years. I skipped the last two season (even though I have the annual pass *sigh*).

Lightfall is peaking my interest. If I was to get back into it, what would one suggest I do in-game between now and Feb 28?