All very laudable but please be careful. Who says "better use a CN23" and will people understand the importance of incoterms. You don't just select one at random.
I'm not saying this is necessarily wrong but I am saying that you should approach this with caution and don't just use something because someone says you should or you've just spent 2 minutes reading an explanation on the internet. Yes, this is straightforward for people who do it daily but it's not straightforward.
If you are a business. take advice from the carrier. They have the necessary experience to tell you what you need to do. The HS code tool could be useful although there are many such tools on the internet.
Again, apologies for the cautious note. Getting something wrong could end in confiscation.