Replace Mitsubishi Spacestar Soundsystem?

Moin, I’ve been driving a Mitsubishi Spacestar with 110 hp for about 1 1/2 years. I’m also very satisfied with it as the first car, but the sound from the radio could be better. I think I have the 3rd or 4th equipment variant, so with Apple Car Play on the radio. Now I wonder if I would install another sound system, or otherwise modify the sound, I would like to keep the features like Car Play etc. How should I do that best? Maybe it’s enough. ch just a change of speakers, don’t know me that way. Thanks already in advance Chris