The biggest enemy of renewable energy and energy independence in Poland is what I call the "coal lobby".
As I recall, wasn't it someone involved with coal and Russia that was behind the whole recording of politicians in Warsaw?
Polonius, yes, it's an area that Poland should really try and focus on. The EU will provide considerable resources in that direction, and should something viable happen that doesn't result in huge environmental issues, then the EU will fund it even more. The two biggest problems are that the price of gas at the minute is too low to make alternative technologies worthwhile, and that gassification of coal results in a significant environmental impact.
The issue of the trade unions is also a huge problem. They have a lot to lose from on-site gassification and carbon capture schemes, as the price of coal would drastically reduce due to the lack of need to transport it. They would also lose considerable influence over the mines, which they may not want.
It's a tough one, but in my opinion, the best approach would be to get the LNG terminal online and then try and convince the United States to start exporting LNG too. That should make the construction of additional storage tanks feasible, and should allow Poland to import a huge amount of LNG. Combined with German and Norwegian exports and re-exports, Poland should be pretty secure energywise.