" what tutorials to use":

In addition to the things aready suggested, you should take a look at the tutorial series Function Datapacks for Dummies.
Also, if you come across any questions you can ask on the Minecraft Commands Reddit or their Discord Server.
I haven't gotten that far yet, but I'm also working on a series of tutorials related to datapacking: Datapacking In-Depth


"how much coding experience is needed":

None. In fact, I think datapacks are a great way to get into coding.


"how long it typically takes to make your first data pack":

This heavily depends on what you want to implement and how fast you learn. Just take the time you need.

The minecraft wiki has a good tutorial on setting up a data pack. Look under "Tutorials/Creating a data pack".

You only really need Notepad or a similar text editor, but something like Visual Studio Code with the Data Pack Helper Plus extension (which is what I use) can make formatting and finding syntax errors much easier.

You'll need to get familiar with commands (if you aren't already) if you want to do more than add custom recipes and advancements!

Here are some resources that are extremely helpful:

• https://misode.github.io/, useful for generating everything from recipes to dimensions
• https://mcstacker.net/, for just about any command you could need

Tutorials to help you get started:

• Tutorials/Creating a Data Pack, Minecraft Wiki
• Predicate Tutorial, Cloud Wolf
• How to Optimize your Datapack, Cloud Wolf
• Structure Block Tutorial, Cloud Wolf

You can look up tutorials for just about anything you encounter. Sometimes you can even just look up questions/problems and find answers on Planet Minecraft, Reddit, Stack Exchange and other forums. Additionally, you can join r/MinecraftCommands Discord server.

Hope this helps!