Eco Lifestyle come with a big world with three neighbourhoods but not that many lots. Get to work has a tiny world with four lots. Both Eco Lifestyle and Get to work EPs bring new gameplay, but you don't have to stop what your are currently doing in your game, no EP requires you to do that, you can just incorporate the new elements into your gameplay when you think it's appropriate. Like Eco Lifestyle comes with a community garden lot where you can buy and sell produce and do some gardening. You can also work on other crafting skills there.
Carl Sims has some guides if you want to learn more about the different packs.
https://www.carls-sims-4-guide.com/expansionpacks/gettowork/
https://www.carls-sims-4-guide.com/expansionpacks/ecolifestyle/
