Hi there and welcome to the boards.
Being a VA isn't really something you can 'try out' per se as a true VA is a business owner who takes his or her business development and success seriously.
There are numerous VAs who work to create their practices while they work in jobs outside the home and then transition out of the job and into the VA business full time - but that is dependent on how much they put into marketing to and securing clients.
I'd suggest spending some time reading through the posts here on the forums for more information.
Best of luck in all you do!