Need Advice on the Best Way to Print This Stage Truss Model!

Hi all! I am fairly new here and to the 3D printing world. I'm working on printing out some stage trusses (I'd like the pieces to fit together like Legos) and having a bit of a time with it. Here's my setup:Flashforge Adventurer 3 LiteNABS 1.75 mm Filament (open to suggestions, just what I have right now)This is what the pieces look like:Attachment 18829 Attachment 18830So far, I get a mangled mess of nonsense. I'm seeming to have trouble dialing in the printer itself. Any help is gladly appreciated I'm super new at this!