You don't need any expansion packs for this. But I have all the expansion- and game packs. Haha. The Sims 5 is actually coming, you may wait until then. But The Sims 4 base game is for free, so you have the opportunity to try it out anyways :D
You can read about a lot of my adventures in the Sims 4. I have written about play through of different game packs. There is a lot of secrets!