The GeForce MX150 supports DirectX 12, so I think you'll be fine with that graphics card.Not being overly technically minded, could someone who is tell me if the graphics card in my laptop will be able to handle the game (I already know I need to buy more RAM)? It is a NVIDIA GeForce MX150
That says it runs on Windows 7. that can't be the case if it uses DirectX 12 as last time I check windows 7 doesn't support Direct X 12.The GeForce MX150 supports DirectX 12, so I think you'll be fine with that graphics card.
The CPU and RAM will also be important, so I recommend that you check those as well.
You can find the minimum requirements on the Steam Store page of Planet Zoo here: https://store.steampowered.com/app/703080/Planet_Zoo/