This is a weird perspective!
How do you deicde which ones to “start”?!
In the time taken to start one or two, you could backtest 500 or 1,000 systems (it’s all automated) to see which ones look worthy of further attention and investigation when exposed to a decade’s data. Once you’re set up to do it, it’s really fast.
There’s no absolute guarantee that something that backtests well will make you steady profits moving forward, but you can be pretty certain that something you haven’t even backtested reliably will give you no chance at all. And at least it’s an easy, fast and reliable way of identifying the “possibles”. Without doing that, one has very little chance at all!
But “Forex Tester”, mentioned above, is hopelessly inadequate for the task.