Yes, it's safe in as much as your maximum loss is known in advance - but then if you trade normally with a sensible stop loss that is the same. By all means try it to gain some easy experience.
Just imagine if a company or individual were able to gurantee accurate predictions. It's not hard to trade $1,000 a pip and higher. So, they would soon be millionaires. Yet, they try and sell their 'predictions' to suckers...
In all the billions of words written on the subject, you'll never find a report of anyone making serious profits from the kind of services you are looking for.
Trading is not easy, there are no short cuts and you will lose money in the learning process.
What do I advise? In truth - stop. Find out a LOT more and them demo trade until you can double your capital. Trading is a world filled with false hopes, illusions and scammers willing to take your money.