For beginners, you can buy coins that are not too expensive. I recommend a good coin and certainly profitable. You can buy doge, one and trx. Good luck.
Buy only small portions of your money to try how trading works, regarding to exchange if you can do some research first before doing this activities, exchange with good reputation and most used by traders is more likely to recommend, try a little bit and observe if you have the skills to enhance from this market.
That is a way among many ways to minimize your losses in crypto if you are a newbie and if you have little experience. But I think this is the best way for newbies to learn how to trade spending little money and trying to figure out their own strategies and coins of interest. This in addition will bring experience and improvement in trading.