@joaosimpson See, much better, I'm glad you took my advice. However, you're not actually paying for Photoshop, right? Either steal it or use GIMP for free.
However you can still use a different source material, see the comparison of yours https://mangadex.org/data/19ee55c33abaf49a70eb63c12796ea62/2-12595a9c130d41b12de3533581501e1e5d895e43cb1ea3942309488dc1eaec00.jpg (I assume portuguese version)
VS
https://s4.imgmirror.club/images/20200111/258_5e19deb4244e3.jpg (japanese raws) from
https://loveheaven.net/manga-parallel-paradise-raw.html
Overall very good improvement, if you need further help feel free to send a message