Here is a map that is Vanilla that my kids like to play , does not need mods , put the map in the 1.16.5 / Saves , directory
page is a bit confusing here are the links to the maps , just get the one suited to your computer
for newer computers
For older computers
Lastly, This mod here https://www.curseforge.com/minecraft/mc-mods/rollercoaster-mod/download is for Minecraft 1.7.10 It will not work on 1.19.3. All mods are version specific. to use it create the 1.7.10 instance or use that alternate coaster mod above
In Minecraft to manually create a game instance , click at the top of your Laucher on the Installations TAB and then the NEW INSTALLATIONS button to open the instance editor. You want to give it a Name , select the Forge version you installed from VERSIONS . Browse to the directory you manually created ,
.minecraft / 1.19.3 /
You now have a working game instance , Select this instance on the PLAY page and run it once to download the needed files . Close and put your mods in the versions mods directory.
Here are 3 sites that are used by mod authors to publish their mods/plugins. You should bookmark them . Plugins are for Bucket/Spigot/Paper Servers , Mods are For the Forge/Fabric modding platforms , Do not mix and match Forge and Fabric mods. nor versions of Minecraft , it wont work.
Get in the habit of creating a different Game instance for each version of Minecraft . The Major versions such as 1.7.10 , 1.12.2 , 1.16.5 , 1.17.1 , 1.18.2 , 1.19.3 and so on , try not to use minor versions
Examples of directories and sub directories to create , for the greatest mod content . Create these sub directories manually and put the mods for each version you want to use , in the mods directory. Warning don't put incorrect versions of a mod in the wrong directory.
.minecraft / 1.7.10 / mods
.minecraft / 1.12.2/ mods
.mincraft / 1.16.5 / mods
.minecraft / 1.19.3 / mods
For Shaders and better graphics use Optifine https://optifine.net/downloads
This may be the coaster mod you are looking for
This should start you off , If you stick with these sites you will be OK.