I have never had any issues with the DEX. Not once have I been worried about hacks, transaction fees, or government regulation while using DEX. As a beginner, you should pay attention to analyzing the reputation of the decentralized exchange, as well as the number of buyers and sellers on the platform because it is crucial to its liquidity. This other point may not sound too important, but an intuitive interface of a DEX will make your life easier as you will not be worked up due to navigation on the platform.