@Elleaisy I'm not sure why the site wouldn't let you start a new topic; it's supposed to be open for everyone. Still, it was easy enough for me to split your comment into its own thread. And I only see the one post of yours, although the other might just be temporarily stuck in the spam queue. (It happens.)
That looks like an excellent computer, able to handle Sims 4 on ultra settings as well as other moderately demanding tasks like image or video editing. There are a couple of small notes about its performance though. One is that AMD processors have better performance with faster RAM. It shouldn't be much more expensive to upgrade to at least 3000 MHz memory. (I'm not familiar with Canadian pricing, but in the U.S., it might only cost an extra $10.)
AMD also released new processors a few days ago, and the high-end versions are much better than their older counterparts. The Ryzen 5 3600 is about $60 more than the 2600, but it's also maybe 40% better, depending on what you're looking to do. (The 3400G is worse than the 2600 though.) You certainly wouldn't need the extra performance for Sims games, but if you're planning on having this computer for a while, or you want to do more intensive tasks like video editing, it's a good investment. You could, for example, add more RAM or swap out the video card without having to replace the processor or motherboard. And I checked: the 3600 will run just as well on a B450M as it would on a high-end board.
Upgrading the RAM is a good idea, though not strictly necessary, and the newer processor is just something to think about. But the one upgrade you really should consider is to the power supply. 500W is enough for this build, sure, but the more important thing is the rating. A bronze-rated PSU is a must, and gold-rated one would be even better. Of course, that's more money. Still, it's the single most important upgrade you can get. You absolutely don't want to deal with a failing PSU in a couple of years. A gold-rated 550W Corsair will last a decade if you need it to, and it's only $30 more (in the U.S.) than the 500W Cooler Master if you go by the cheapest available price.
I know that's a lot of information, and it's somewhat incomplete, as I'm not looking at the same price sheet as you would be. (Feel free to link me the computer store, or anything it's using.) Still, with the investment you're looking to make, you really do want to get the details right.
P.S. I'm not great with monitors, so I can't help much there. The most important thing for you to do though is to look at it, as in, see if the screen is something you'd enjoy staring at for long periods. LG is a good brand, but that's not going to help if you don't like the way the screen looks to you.
