May I buy tickets for the March 14th Charles Lockwood Darragh event in person by going to the paradise today

I always get tickets from there website, if its sold out, try calling to see if maybe some got freed up and ticket system not updated

You can purchase on their website and check if the show is sold out. If it is not sold out you can buy at the door (at a premium) or at their box office (which I think is at the orpheum but you should verify on their website or by calling)