if you would rather play Curse/Twitch packs with MultiMC then that is fairly easy to do. This guide will not show you how to download and install MultiMC. But just show you how to import a Twitch/Curse modpack to it.
First go to: https://www.curseforge.com/minecraft/modpacks
And find the modpack you want. In my case i find “Farming Valley”. Now go to “Files”, and then scrolls down to the newest version of the pack, and click on it. Then click Download. This gif file show you these steps:
Now drag and drop the downloaded zip file, to a empty spot in MultiMC, and click OK. You can see how that is done in the gif here:
You should now see the imported pack, and be able to click play on it
I hope this guide helped you.