Can you add your own props to the stage in the acting career and one more q...

Does this, from Carl's guide, help w/your 2nd question?

The amounts of fame you gain from different activities varies wildly. It takes hundreds of points to gain the higher fame levels, so simply standing there posing for pictures won't do. Completing large tasks, like finishing a book or filming a movie are more likely to give large amounts of fame than low-ranking tasks. The earlier tasks are fantastic for getting you started, but you will need the more potent gains to truly make it to five-star celebrity in a Sim lifetime. I wanted to clear this up, because the game simply shows a +star symbol and the player is in the dark about just how much they gained, given the lack of progress meters (like we have which skills, which when hovered will show a percentage to next level).

Other simmers have reported that any changes you make to the premade studio only last for that visit; it resets when you leave--or so I've read!

My Sim reached Global Superstar and it unlocked the large street scene outside of the studio, but no gig I am offered is ever shot on that street. What do you have to do to get that gig?