LIGHT!!!
Paint somewhere with abundant light. Or procure a flexo to paint under. Your eyes will really appreciate that.
Do not place your drink side by side with your paint water. It does not taste good...
If you are in a dry climate a wet palet will make a big difference. If not, it is not that important.
I hold the mini by the base, but handles like the ones proposed are good too.
If you are painting several minis on the same scheme you can paint them together, so you apply all thebgreens to all miniatures, then all the reds... I wouldnsuggest taking notes on what colors you are using in case later you want to reproduce the same scheme or technique somewhere else.
And paint. Your first minis will not look so good, bit you can improve only by painting, and the improvement is fast.