First of all you need to find out, if those $27 is actually a "bankroll", or if its just an amount of money sitting in your poker account. The term "bankroll" means money set aside for poker, and it also imply, that you are not willing or able to find additional money for poker, at least not in the short to medium term like the next several month. If that is the situation, you need to use, what is called "bankroll management", and basically this means managing the money in such a way, that the risk of ruin due to a bad run is neglegible. Often a number like 1% risk of ruin is assumed as reasonable.
If that is the situation, then you are actually not even bankrolled for $1 SnGs. At the very minimum you should have something like 50BIs for single table SnGs, and more for multitable games. So with $27 the only reasonable games to play on
pokerstars are $0,5 9-mans and $0,25 On Demand games. Then when you have $50, you can move up to $1 9-mans and $0,5 On Demand games, and at $100 you can move up $2 9-mans (or other similar formats) and $1 On Demand games.
However it should be noted, that bankroll management is only possible for winning players. Losing players will eventually lose all their money, if they continue playing. Its just a question of, how long it takes. With 147 games played (
sharkscope) you still dont have a track record to prove, you are a winning player. So for you it might make more sense to talk about a poker budget rather than a bankroll. Under "tools", "responsible gaming" you can set a monthly deposit limit, which fits your financial situation. Lets say you go for a budget of $50 per month. Then every time you get a paycheck, you deposit that amount, but only if the balance is below $50. And then you just play, whatever gives you the most fun and the best practice.
If you have reason to think, you are a winning player, for instance because you have played a lot of other sites than PokerStars, then the third option is to make a deposit right now and create a larger starting bankroll. For instance you can deposit $100, so that you have $127, and then use bankroll management from there. That will allow you to play $2 9-man SnGs, and then you move back to $1 games, if you drop below $100.