Reading some of your replies, you are good at coming up with reasons you cannot be successful.

A friendly suggestion: this attitude may be holding you back more than you realized before now.

What to do instead, is repeatedly ask yourself: "how can I do this?"

Apply this to many specific areas:

- How can I change my CV so it comes across differently?

- How can I begin a small startup without money or other resources?

- How can I move towards my goal without any new degree?

- How is my training in veterinary medicine an asset?

- How can I do medical ML for veterinary medicine?

- Et cetera...

You have a choice now to dig into your heels and say to yourself reasons why none of what I say above will work, and why your situation is truly and utterly hopeless.

OR you can say different things to yourself, maybe get a different result.