I have been playing only 2 months and the NS2 I got in Jan is my first Nintendo experience.
I played for about a week and realized I wish I had set up my island differently. So I reset the entire game and started over fresh.
It really helped me better understand the game. I really like the way my second island is laid out. So much better than my first island. I also took advantage of what I learned the first time so I was able to progress quite a bit faster.
So don't be hesitate to restart with a different island in the first week or so if you want.