The black DTFB is fine. Peel off the INSIDE paper and you save some weight. (after everything is cut, spray it with some water and the paper comes right off) I never noticed a weight difference, but I always though it was a PITA to cut straight for some reason. Always ended up with ragged edges like the paper tore instead of cut.
For building - Build a bunch of stuff - just build it to practice. Trust me. Each one gets better and better. The tiny trainer with the MUTTS conversion, or the Das Little Stick in the user generated builds are some of the best flying planes out there. Both can be converted to mid wing with not much issue. I recommend EVERYONE build a stick style plane and fly the snot out of it - they are much more aerobatic than you think, and one heck of a performance jump from a cub style. I wouldn't say "beginner" but definitely a good stepping stone to higher performance.
Now - for building.
SKIP THE HOT GLUE, especially on more intricate builds. Buy a big bottle of Titebond Wood Glue, or Elmers wood glue, and cheap scotch tape. Especially on builds with the complex alignment, having more time helps, and less burnt fingers. It's also way lighter than HG. Titebond Quick & Thick is one of my favorites. Another trick is to use wood glue as the "main" glue, and hot glue to "tack" the pieces into place. (like on a long fuselage fold, I'll wood glue the channel, then a small dab of Hot Glue at each end and maybe one in the middle...)
Any spray paint will work on DTFB but make sure you spray it on LIGHTLY, let it dry, then spray another layer LIGHTLY. If the paper gets "wet" that's when it bubbles. But colored tape works just as well. Most of my DTFB stuff doesn't last long enough that I even bother
From a build perspective vs performance? The FT3D is way way easier to build. It's cheaper to fly on the smaller powerplant setup and has more "real 3D" capability (in my opinion!) The Edge is a handful regarding the build (way more complex than "standard" FT planes) and flies more "sport" than "3D" at least in my fingers. (The FT3D flies closer to a flat plate foamy, where the Edge flies closer to real balsa, if that makes sense?)
For what you're after? Take your time and build the Edge and hang it up? You can always build another one for what, $5 in foam when you're comfortable with the sticks....no harm no foul.
Sorry, but for
anyone thinking they are going to fly a cub once or twice and then fly an FT3D or Edge and have it survive? That's almost in the same line as "I wanted to learn 3D so I bought an all balsa Precision Aerobatics 63" Katana" - it just ends - poorly. Start with somethig like the FT3D, or cheap (value hobby is my favorite but you can cut your own from DTFB) flat-plate style foamies.
Along with a Stick, I think everyone should also have one of those to fly - it REALLY improves your stick dexterity, and who cares if you crash it, just pick it up, straighten the prop and toss it up again.