If it's any help, my first two models after a 20 year hiatus were brush painted using Tamiya paints. I thought they looked pretty good, until I logged on to here and saw what I was up against! Actually the paint job turned out alright, it was the canopy and decaling that was (and still IS) my undoing. Slow and steady, don't try to rush it. If the paints getting tacky half way through, then stop half way.
In my opinion Tamiya are excellent paints (I had better, I have 70 bottles!!). I have a couple of bottles from 20 years ago that are still in excellent condition, and are perfectly useable.
The Future will gloss up your paint, but the best way to apply decals is to paint, gloss coat, decal, gloss coat, flat coat (if required) and then weather, so it shouldn't be a big deal.