Can I negotiate non-compete so I can still work in my field if I quit, move on or want a better job? [closed]

Non-competes are mostly just smoke and mirrors. Don't let that impact your job search.

1. Don't speculate. Read the agreement in question (when the time comes) and then check whether there is anything objectionable in there.
2. If you feel it's unreasonable, you can certainly negotiate. Be specific though: suggest very specific changes and/or mark up the agreement. That's not particularly unusual in the US
3. Check your local laws. In many legislation non-competes are legal but not enforceable. That means, the company can ask you to sign it, but they can't take any action if you violate.
4. Even if it is enforceable, the chances of a company going after a relatively junior employee are vanishingly small. Legal action is time consuming, complex, very expensive, and really bad PR. There is almost no benefit to the company, even if they do win . Why on earth would they do that?
5. Any legal action is quite rare and almost always restricted to extremely senior employees of large companies, where there is enough money in play that it makes it worth the considerable pain of going to court.