I would strongly recommend against choosing Pokerstars.
After playing there for many years, I have come to the reasonably assured conclusion that is grossly flawed.
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I am not stating it is rigged or some other such nonsense, but I am stating it is atrociously flawed.
Never have I played at a poker room where the RNG is so corrupted (ineffectively constructed) as this one is. Some will say "It's luck!" and to that I would say, so are slot machines. The PS RNG is useless, as far as reliance is concerned. If you are relying on PS to have an effectively monitored/built RNG, forget it.
This is actually only half the problem, however. The other half of the problem are the donkeys in that poker room.
Donkeys are individuals who do not understand the basics of Poker, nor the proper rules of the game. They bet on everything and anything.
This is not conducive to an enjoyable game overall. It simply leads one to frustration and consternation.
A better choice, IMHO, would be Poker Mira. I find that poker room to be a better balanced site, and far more enjoyable overall.