Keep the basic discovery scanner and sell the shields and fit a fuel scoop 1E
Use the Economic route setting, Aim for Kappa Fornacis
It WILL take a lot of jumps, but ping and scan as you go, adjust your route when you pass the unscoopable belt, and dock if you need to refuel and there wont be scoopables with out a big side track
Basic Video on route planning
At Kappa Fornacis stop at Harvest Port in orbit of Panem and sell your discovery data, this will get you enough for a Better Frame shift drive. Also buy 4 tonnes of Onion Head.
Then Plot an Economic route to Wangal, scanning as you go, even if just the main star.
From the sales of the Data and Onionhead inWangal, you should be able to get an Eagle, and start outfitting it to you Dream craft.