Last Update vor 5 Monaten
No. You can get started with any amount of karma or even none.
But you should get some karma before you start using your account for promotion.
You can first comment on rising posts in the biggest subreddits (for example, r/askreddit). Once you have some comment karma, make a few posts in popular SFW (safe for work) subreddits.
Alternatively, you can start posting in r/gonewild right off the bat. It's the biggest NSFW subreddit, so you'll gain karma quickly by posting there. The trick is to do it before you mention you have any OnlyFans, as sellers aren't allowed there.
By using any of these two strategies, you'll get a solid account that won't have any issues with Reddit's spam filters.