Starting off on a shortbord?

So I've been around board sports for many years now, including snowboarding, wakeboarding, kiteboarding, skateboarding and skimboarding.
Now I feel like I want to try to get into surfing. The problem is that I don't have tons of money. I know that people say that beginners should always start off with a longboard so that they can get used to being on waves on stuff. I don't think I would have the money to upgrade as often as i should, which leads me to the following question:
Would it be that bad of an idea to start off on a short board?
Since I've been around board sports for many years (especially skimboadring which resembles surfing a lot) I feel like I would be better than the average beginner making it easier for me to start with a shortboard since I already have quite a lot of the actual "on-wave" stuff down.
Hope you guys can help me.
Cheers
Now I feel like I want to try to get into surfing. The problem is that I don't have tons of money. I know that people say that beginners should always start off with a longboard so that they can get used to being on waves on stuff. I don't think I would have the money to upgrade as often as i should, which leads me to the following question:
Would it be that bad of an idea to start off on a short board?
Since I've been around board sports for many years (especially skimboadring which resembles surfing a lot) I feel like I would be better than the average beginner making it easier for me to start with a shortboard since I already have quite a lot of the actual "on-wave" stuff down.
Hope you guys can help me.
Cheers