The images in the Maths course are definitely 'eye candy' - the course is about understanding the maths rather than building specific setups.
I came to H from C4D myself - about 2 years ago. The thing to understand about H is that it's very different to a 'standard' DCC like Cinema. Someone described it as: "A 3D tool development environment, that ships with a reasonable set of presets." - and that's not a bad description.
With H you must invest the time and effort to understand the absolute fundamentals to leverage the power. That takes time. I was probably a year in learning fairly intensively before I started feeling comfortable in just the geometry and rendering areas.
Entagma is good - but can be a little deep if you don't have the basics. I'd really suggest you dive into the basics of SOPs and get a firm grounding in all the critical stuff - working with points, normals, attributes... these are key elements in building good mograph setups - and fundamental to all of H.
Start here but focus on the SOP's stuff:
https://www.sidefx.com/learn/getting_started/ [
www.sidefx.com]
One free addon that you might like is MOP's:
https://www.motionoperators.com/ [
www.motionoperators.com]
That will ease you from C4D mograph to Houdini...
Enjoy the ride, but be patient. It takes time.
PS: and always make sure you have the 'Side FX Labs' set installed - full of really useful stuff.