Breeder reactors have been failures.  Japan and France have largely abandoned it.  MUCH more dangerous than conventional reactors.  U extraction from sea water would take more energy than it contains.  Nuke waste causes cancer and birth defects

Nuclear Regulatory Commission's 1975 "Barton Report" predicted a plutonium economy (breeders and reprocessing) would require suspension of civil liberties to guard the pu-239.  Reprocessing enables nuclear weapons proliferation, the reason President Ford canceled breeder plans.  Reprocessing (dropping irradiated fuel rods into acids and solvents) made the waste in the Hanford tank farms.  We are no closer to detoxifying nuke waste than we were in 1942 when the first reactor went critical.

Reforestation, permaculture, regeneration of the soil, water efficient diets (ie. not factory farm cows) are energy efficient and practical.   I know people who do aquaponics.  Most important: recognize limits to exponential growth on the round, finite Earth.