Sure, you can rank up from scratch to Hero or Legendary member. There is a topic that observes and lists ranked up users.
⭐ Forum chronicle - UP Rank List - Congratulations! (BPIP Merit stat, Trust) ⭐
The list does  not point out which users are purely self-made users, which users are half-self-made users, but there are so many self-made Members, Full Members, and Senior Members. They all will become self-made Hero or Legendary in months and years to come if they will stay on their tracks.
Therefore, I believe that long list of ranked up users will stimulate you to start from scratch.