Hey buddy, if you look up the GH feed chart I believe it tells you the order to mix.
If I remember correctly, it’s like this:
Cal mag
Micro
Grow
Bloom
Then pH your mix.
Add a nutrient to the water, stir, then add the next one.
Ppm pens generally don’t need calibration.
Shake the nutrient bottles a good amount before use. The micro bottle will foam up if you shake it too fast so try to shake that one slower and maybe a little longer.
I shake my bottles 100 times each before adding to water. Sounds like a lot but only takes about a minute.
Good luck in your garden!