Hello there, fellow Blender user! I'm a beginner in 3D modelling as well. I haven't tried any paid course though, the free tuts on YouTube are enough for me at the moment. And I couldn't agree more, practice is the key to get better and better. Anything good takes time, but it'll worth the while!

Your creations are looking good so far, that house scene looks like something I'd see on a brochure or something. A little more touch and it'll be perfect. It looks professional, I like it.