Use the Micro Set first. Then coat the decal with Micro Sol (if needed). The Micro Sol will cause the decal to wrinkle. Don't panic! That's normal, and the decal should snuggle down to the model's surface nicely.
Here's the sequence I use from bare plastic to painted and finshed:
What I'm doing looks more like this:
1) Paint
2) Future
3) Micro Set
4) Decal
5) Micro Sol (while decal is still wet -- about 10 min. after putting decal down).
6) More Micro Sol for decals over raised detail. Repeat as needed until the decal is really snuggled down. Poke pin holes over air bubbles and apply Micro Sol on them too.
7) Future for a gloss over coat. Tamiya flat base can be added to the Future to make a semi-gloss or flat top coat, but I've not done that for my models yet.
Of course, leave plenty of time for drying between most of the steps. Steps 3-5 can be done in about 10 minutes per decal, but the rest of the steps require some drying time.
One key is to not soak the decal for more tha a few seconds in the water. Take it out, and let it sit for a few more seconds before tryint to put it on the model.
Hope that helps, and welcome to the forums.
Regards,