Hey there,
If you are just starting out in DW, you first need to get enough points to go to other areas (and have 8 badges to go to all 3 areas). The fastest way to do this is to play every day for about 2 weeks, and play every single mini-game the day is willing to throw at you to get to 5000 points, and another 2 weeks to get to 7,500-10,000, which is where the good stuff are at. Also, accept any Dream Pal requests, and plant lots of berries, as that will give you points also.
The Pokemon that you tuck in will cause results each day, though I find tucking in certain Pokemon will cause you to go to a certain area more often, but I don't bother with that until I unlock more areas.