I need Help

Is there someone who can mix 3 songs together .
I need this for my fathers funeral on Tuesday.
I tried to do myself during this Sunday but no good result.
Kind regards Wouter

Can drag & drop the audio files into Audacity, then select "Align end to end",
Or align manually with the time-shift tool

Then export the 3-song track as 16-bit WAV audio file (which should be playable on any device).