Seems good. You can get everything cheaper if you go used, but I get the allure of building a new computer too.
I'd go with atleast a 650W PSU and 16GB ram for future upgradability.
The reason to choose a better PSU right now is that later on, suppose you run into some money in the future, you can upgrade to a more powerful 8+ core Ryzen 3000 or 4000 chip and a better gpu.
The reason to opt for more ram is, because 8GB will soon be inadequate, as things like web browsing are getting pretty resource hungry and when upgrading for more ram later, you might not get the identical set of ram and have to buy new ram altogether.
https://pcpartpicker.com/list/8vmc3b
Edit:
I strongly recommend a better case too.
https://pcpartpicker.com/list/TsPqKB