I agree about boosting the treble (centred somewhere around 2.5 kHz) to bring out the vocal, but what else you do depends on the kind of sound you want.
The bass can be tightened up (made less muddy) while retaining most of the low bass by just cutting frequencies around 200-250Hz.
Compression can help to tame the drums (which have peaks that slightly dominate the mix) and allow previously buried sounds to be brought more to the fore.
Just to give an example of the kind of variety that can be achieved, here’s a before/after where the after uses pretty heavy compression (using the built in compressor from Audacity 1.3.12), the treble is raised a bit (centred around 2.5 kHz) and the mid-bass (around 200-250 Hz) is dropped down. The stereo field has been widened using the Channel Mixer plug-in ( https://forum.audacityteam.org/t/channel-mixer/14632/8 ) and a “concert reverb” added using Freeverb.