Jonas has a YouTube channel where he offers high-quality free content. While he doesn't upload his full paid course there, he has excellent tutorials that cover similar concepts.
: Ein kompletter Lehrplan mit interaktiven Übungen. The Odin Project : Ein projektbasierter Full-Stack-Lehrgang.
: Er erklärt die "Engine" hinter JavaScript (Execution Context, Scope, Hoisting).
Based on your search text, it seems you are looking for and are interested in finding it "kostenlos" (free of charge) .