Audacity does not do voice to text. You may be able to use Dragon as a free trial for a one-off conversion.
You could try Windows XP - Install speech recognition.
You might find an old application called “Wave to Text”. This used to work quite well. Use the search feature in your web browser, but be very careful because most of the current download sources have injected malware into the application. You are already at great risk by using Windows XP. See Important information for Windows XP users.
If I was searching for that application I would try to find it on a web archive service that stores old web pages, such as Wayback Machine.
Be aware that speech recognition software is not perfect,especially the first time until it learns the particular voice. You will have to go through the produced text file and edit it afterwards.
Gale