Whatever you do, don't sell yourself short. You would be amazed what can be done even in a SIDEWINDER. My first circumnavigation attempt was in a sidewinder. It failed...but for altogether different reasons. If you check out CMDR Erimus's DISTANT SUNS blog and videos, on his way back from the far side of the galaxy he encountered a pilot on the far side of the core who was crossing the galaxy in a sidewinder. THAT PILOT was successful in his journey. It all depends on how much perseverance you are willing to put into the project. The galaxy is bloody HUGE!!! As such any such expedition is going to take TIME. First, make sure that your ship is fitted as well as you can. 2) LEARN HOW TO FUEL SCOOP WITHOUT KILLING YOURSELF!!! (that is what did in my first attempt, though I made it back to port alive...barely)