I made a long documentation about how loud your music should be mastered. You can watch it here: https://youtu.be/JSztsk6SgEk
Buy the original 24Bit HighRes Audio Masters Album at: www.qobuz.com OR buy it directly from me for 11,90€. It's cheaper and I get a little bit more out of it. But it takes 0-2 Days until I respond. Just write me an E-Mail here.