A few days ago I finally did this DIY which I had planned for ages! I did a dip dye and a tie dye/ ombre shirt, and I'm pretty happy with how they turned out! I don't know if it's necessary to tell you how you can do it yourself, cause there are a million tutorials to find on the internet, but I'll just tell you the important things :)
For the Dip Dye / Ombre shirt
When you full a bucket of water, normally you'll add all the paint.. But now you add just a quarter first for the lighter shade on the shirt, add more and more paint for the darker shades until you've add all the of the paint. (Besides that you can just follow the instructions on the package)
For the Tie Dye
You have to make your shirt wet first, then tie the shirt with elastics, and follow the instructions on the package, that's it!
Hope my explanation was clear for you! And good luck if you're gonna try it! :)