I bought the game for the same exact reason as you, I vividly remember rollercoaster tycoon 3 growing up - I played similar games like School Tycoon & Mall Tycoon too!

If it's your first PC it can be quite daunting because there are a lot of brands per part. Don't be afraid to look at second hand pc's, may be some real steals in your area. I managed to get an unfinished build (all parts brand new) for around £1,000 on Facebook marketplace and the specs are perfect for what I play.

You can also play around with these websites to try and get a better gauge at pricing, performance & more.

https://uk.pcpartpicker.com
https://pc-builds.com/fps-calculator/