How to do embroidery on tulle netting fabric?
You can use all embrodery technics as long as you realize that the back will be visible. Not just the back, the threads will be visible all along, but so do the knots and mistakes.
It is likely best to keep your fabric in a hoop or stretched over a frame, so you will not draw it in while working.
There are special stitches which are the same front and back. You can find them online or in older books.
One stitch I remember is like weaving, filling a few holes at a time.
But you are not restricted to those stitches, you can use most stitches, as long as the 'back' does not spoil the front.
I just ran a google search on -embroidery on tulle- and got so many results that I tried to specify and added -stitches- but the results are still way to many to pick one.
If you like videos, youtube has several.
This is a random one that I liked when I saw it:
https://www.youtube.com/watch?v=Dzq5d3pP6IQ
And this is a text and pictures page, which does explain how to work on tule, again a random choice, I have no links with the site or people behind it:
https://crewelghoul.com/blog/how-to-hand-embroider-on-tulle/