You need the hobby shop to buy the telescope and canvas! Build the hobby shop and buy the item you need, place it at the house, choose the sim you want to use, click the item and choose the task for your goal.
For the soccer ball you need the soccer practice field from the hobby shop! Same directions as above!
To visit the park, you must first build the park then go to the town map and click on the park. Whistle a sim to your location!
You must level up, have enough money, make sure you have enough sims, and make sure another workplace isn't in progress of building before you can build a new one!
You can get money by sending your sims to work, gardening, and your pet!
You buy the dog kennel from the pet shop, so you probably need to build the pet shop!