@King Arts are we to assume that we have only the knowledge that a random jedi would, or do we keep our own knowledge of the setting? If it's the first, then heading out somewhere on the rim and doing a low key robin hood thing is probably the best bet that's not wildly OoC for a Jedi. Hopefully my jedi is smart enough to hang up the lightsaber, or at least reserve it only for emergencies.
If we keep our knowledge then I either do that until about the time of Luke re-establishing the jedi at which point I use years of preparation and resource accumulation to raid/infiltrate the maw to steal the sun crusher which I will absolutely use only for good. Alternatively, starting the same as in the first scenario but maybe even further out, I slowly build up resources from bringing down pirates and criminals, until such time as I can afford to design and build a small capital ship. With meta knowledge and some common sense it should be fairly simple to design a ship that is a huge improvement on what exists already. Combining that with knowledge of secret bases, what defence's are present where, real world tactics and some basic common sense you should be able to inflict damage on the empire disproportionate to the size of the group I'd build, whilst ever improving your own situation and building up a stronger force.