Your grammar and syntax are actually very good. The only thing I would point out is your pronunciation of /r/ and /d/. In many places you combine an American /r/ with a Spanish /r/ and the result sounds like two separate sounds. In Spanish, /r/ is just a simple tap. You say it perfectly in the word curiosidad. Also remember that /d/ between vowels is pronounced like English "th" in "this." No listen again to the beginning of your recording, the word **pudiera** has the wrong /d/ and an Americanized /r/. It should sound like [puð•yé•ɾa]. Also, you need to tighten up your vowels. The beauty of Spanish is that the vowels always sound exactly the same — they're all pure. Yet in some places you revert to the loose [ey] and [ou] of English, instead of pure [e] and [o]. Aside from that, congratulations on your brilliant Spanish! If you need me to illustrate these sounds, let me know and I'll set up a Zoom.

i am from mexico :) pedemos practicar español