Hello ! I'm really new here. Just created my account 18 minutes ago. I decided to register when I learnt about signature campaigns, which seems to be a cool thing for many. So I wanted to know : is there a signature campaign that accept newbies, or will I have to get an higher rank ?
You can, in fact, buy established accounts and use them in sig campaign. There are many account sellers around, who has some extra accounts.
I don't advise you to this. My advice is that you build your own account with your own pace. That you read, research, learn, engage in discussion, etc.. This is how you will learn a lot and actually post meaningful and quality posts that will bring quality to discussions.
If you are new and you just buy an account, you still need to know what will you post about. You cannot just post some nonsense since you will get banned for spamming.
It's up to you. Good luck!