Looking to change my own voice for audio production

Hi all – I’m new to this sub-Reddit, so hopefully I’m in the right place.

I am working on an audio production that will span multiple episodes and hopefully multiple seasons. It will require many characters, ranging in gender, age, ethnicity, etc. I am a decent voice actor and can do many of the roles myself, but some of them I cannot fake using my voice alone.

My budget is very limited, so I was hoping to find some type of software I can change my voice for the production. This can be during the recording process, or after recording… As long as it gets the job done, and makes me sound like someone else entirely.

Does anybody know of a software that can achieve this? Most of the software I found either specifically designed to change users voice on the spot and is aimed at gamers changing your voice for live streams or in-game chats. I’m also on a Mac, which I know will be limiting.

I’m having a hard time finding something I can use. Any suggestions will be helpful.

Thank you!

EDIT: To clarify, I don’t want to just change my voice to sound different in general. I want to specifically sound like a woman, an elder man, or someone of a different ethnic background. Those are just a few examples.