as a beginner myself, i rlly reccomend to try easy challenges, but challenge yourself to write as little code as possible, but also make it compact and nice. this, while works, is really an "over-do", as a simple

return " ".join(s.replace(" ", "").upper())

would do, since it returns and creates the text on the same line. also looks compact and clean.

again, just a suggestion

theres more comments here than actual code lol

but helpful