Ok @MarinaLevy, I’ve just setup a project using docker + windows so I will be able to guide you through the different steps in order to make your Forestadmin works.
A quick recap of what we are going to achieve is run a docker image on your computer rather than a virtual, this image will be the link between your database and Forest Admin.
First I’ll have to install docker on your windows machine, following these instructions. Then install git bash which is a terminal just as powershell is but has the same command as Ubuntu terminal and works almost the same way. Once you’ve done both previous step, we are ready to jump into the Forest Admin installation !
Here we should be at this step
Launch your freshly installed Git Bash terminal and copy paste the instructions you have on your onboarding screens. When running the docker run command you will have to prefix it adding winpty + docker run etc… Your backend should be up and running. 
NB ( 
): You will only be able to access your forestadmin through your machine having docker running. If you want to be able to use it from any computer and any place you would have to deploy your project to production.
Let me know if it works !