New surfer and could only afford a short board

So I'm new to surfing, and I didn't have 400$ or whatever it cost to get a long board and then upgrade in some time.
I went on craigslist and found a surfboard for 70$ It's a lot taller than me. I'm only 5'3 and that's maybe 5'10 or 6ft?
It's a GEE glass thruster fin board.
I mean I've skateboarded, Longboarded, Skimboarded (Wooden), boogie boarded, just not surfed.
So I mean.. Would I be okay with this?
And why is it such a NO NO for beginners to get short boards and all that?
I went on craigslist and found a surfboard for 70$ It's a lot taller than me. I'm only 5'3 and that's maybe 5'10 or 6ft?
It's a GEE glass thruster fin board.
I mean I've skateboarded, Longboarded, Skimboarded (Wooden), boogie boarded, just not surfed.
So I mean.. Would I be okay with this?
And why is it such a NO NO for beginners to get short boards and all that?