To get good sound from a Turntable requires a huge investment. Unless you really want to spend over 50-200k you will never be happy chasing dragons.
sell you turntable like I did and focus on digital and getting a better amp and speakers first. Or buy a Kronos Sparta for about 30k-35 with a good tonearm and get a 20k audionet phono stage with a 10k power supply for it. You will also need Kubla Sosna elation tonearm cables and power cables.
All this will not be perfect but will be a step up from what you heard in your friends room.