Where do you live?

Check with the local library. Tehre may be local options you are unaware of. In my area the police auction off items they have retrieved, it's possible to get a bike that way.

If you're learning to ride as an adult, it's a good idea to ride on soft ground because you are going to fall. Get a helmet and good gloves.

I feel like getting a feel for walking and financially getting to a place where you can familiarize yourself with public transport can make the transition easier.

You can also pay attention to the road signs while walking, they are quite intuitive and they can help boost your survival rate once you get to drive an actual bike.