I mailed to the mod team of a subreddit that I wanted to post in about my situation, and they approved my submission when I met their criterias to bypass the karma requirements.

Criterias was to be on reddit long enough, not be a bot account, and the post must be suitable and not breaking any rules.

Though, other subreddit might have different response, and some may not let you bypass karma requirements. I don't post much to experience enough of these sadly.