If I'm starting off a new sim I (almost) always start them somewhere with 3 fishing spots. I switch aspirations as I do whatever fits.. friend of the world to meet anyone, switch to jokestar and joke, switch to cooking to cook ect. They go gather in the area and hopefully get two frogs. I switch to fishing and hit the three fishing spots.. maybe lingering and doing up to the second level of that aspiration. Then I switch to collector aspiration and pull the stuff I've collected in and out of the inventory with whatever I have on hand that matches.. can go through quite a few levels if your lucky the first day. If there are multiple sims in the household I trade the inventory over and have them do most of the aspiration also. Then I buy a few rewards (always welcome and always friendly are favorites). Then my sim is ready to start life. They might focus more after that on aspirations meant just for them.
I never give them a job right out of the box. I give them a few days to build up some reward points at least.