So basically back in the day you had to drop a bunch of stuff in folders and edit a few files. Then FTB and technic both made stand alone launchers that you just logged into with your minecraft information and it took care of all the downloading of directories and mod pack building for you, so you just clicked a modpack on a menu, it downloaded and then you could launch it.
Those fell by the wayside just recently and now its all done with the twitch desktop app.
https://app.twitch.tv/So you get that going then enable minecraft, then click the creeper head then get it loaded, then click BROWSE MODPACKS and select Project ozone 2 Reloaded.
yes it-will- have crazy factories and stuff but it doesn't have any of that on there yet.
it used to just be one simple launcher and twitch sorta gobbled them up or something for some reason.
I think you can still use the technic launcher but i dont think it gets patches to the actual game files as quickly as the ones on twitch. i'm looking at the technic modpack version right now and its 8 months behind the one you end up with.
I understand if you don't want to deal with twitch, they sort of suck.