You can admit you are afraid without presenting fear as evidence against the opportunity.

Fear rarely announces itself. It shows up wearing the clothes of analysis: the timing is wrong, the numbers are thin, you would have to move, they probably want someone else anyway. Once it is dressed that way it cannot be examined, because arguing with it feels like arguing with reason. Saying plainly that you are frightened puts the feeling where it can sit beside the real considerations instead of impersonating them.

Name it out loud to yourself or to one person you trust. Then list the real risks separately and see how many survive. Fear and a bad idea can coexist, but they are not the same finding.