Desk recordings from digital desks will almost always sound quite quiet as, assuming you use sensible gain structure, you’ll be peaking at around -12dBfs. Commercial recordings peak right at 0dBfs and are compressed to within an inch of their life (and sometimes beyond!) and so will always sound massively louder. Just take your recording in to your DAW of choice, apply a little compression / limiting if necessary and turn it up until it’s peaking just below 0dBfs.