I cant help to feel, that whenever people ask a question like this, they are simply asking the wrong question. If you play poker for fun, then your goal is not to "build a bankroll", so instead you should ask yourself, what you can afford, and what you enjoy the most. If on the other hand you play for profit, then starting with just 25$ is simply a waste of time, even if you live in a country like Brasil.
In top of that if OP "always played on PokerStars", how come he does not already have a bankroll, if he is a winning player? So perhaps the real question here is, if there are other sites, where its easier to beat the games and become a winning player. And if we are talking about games, which you can play for 25$ without a high risk of going broke, then the answer is no.
If you can not beat those 25c 45 and 90 man SnGs on Stars, then you are not going to be able to beat any other games either. They are in fact the perfect training ground, because they run so frequently, and the rake is very low as well. For comparison if you decide to play 50c MTTs on 888 Poker, then only a few of these run per day, so you cant get any sort of meaningfull volume, and with just a 25$ deposit the risk of going broke will be very high, because the fields are very large, which lead to higher variance.
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