Most digital audio workstations (DAWs) support instrument and effect plugins. The industry has largely settled on the VST interface for this [1]. On Macs it's a bit more complicated [2], I believe you can use VSTs, but there's also Apple's AU plugins and AAX.
Logic Pro should support AU but not VST I think. There's an entire industry that makes and sells these plugins, preset packs, sample packs, and other services. For example, Roland makes a pro VST/AU plugin called Galaxias [3] which requires a subscription but gets you access to near perfect software reproductions of nearly their entire synth lineup.
Synth designers are very opinionated, so they all sound different or make different choices that affect how different people get along with them. They're like DAWs that way. Lots of people swear by FL Studio, I can't stand it.
Give Helm a try. It's the only way to know if its opinions mesh with your own.
