It is pretty simple and can be done in 4 steps:
- Get yourself a Polish citizenship confirmation and Polish vital records,
- Book a visit in the nearest Polish consulate,
- Take a nice passport photo,
- Go to the consulate and submit your passport application.
It is not possible to get a Polish passport from the Consulate by a proxy, by the way. You need to apply for it personally, since your fingerprints have to be taken.