Lyophilization of ethanol is very diffiuclt unless you have a system that is cooled by liquid nitrogen. The freezing point of ethanol is -114°C. Using vacuum, you wound need a pressure of 0.0002 millibar to achieve this sublimation point, which would be a challenge.
Suggest solvent exchange for the ethanol and use a solvent that is more friendly for freeze drying with more commonly available equipment such as cyclo hexane or tertiary butanol.
If you can, select a more suitable solvent system from the start, one that can be evaporated / freeze dryed.