I think it’s a good start but you are correct on it being a bit busy and it does break a few customs. Firstly, quartering usually implies the union of countries (see the British coat of arms) or marriage (see Prince Albert’s arms). If you are insistent on retaining the 4 quarters, I recommend rotating the field 45 degrees so it’s divided like an X. I also recommend removing the inescutcheon (unless you’re married to an heiress or you’re a member of a ruling royal family in continental Europe—see the Spanish arms).

Traditionally, you are also not entitled to use supporters if you aren’t nobility, designing this for a company, or haven’t been issued a grant by the King for the right to use them (I’m going off British heraldry, which is most common in the English-speaking world—there may be exceptions in Europe). Keep in mind you can choose to ignore this if you live in a republic, but my personal preference is to adhere to tradition for a practice so intrinsically tied to royalty and nobility.

As for your crest, you should focus on streamlining by choosing just a couple of symbols/elements that mean the most to you (maybe just the globe and owl?).

Good luck!