I think Comixology is a great option. It offers high-quality scans and has a user-friendly interface. Also, it often has exclusive content and updates regularly.
I think specialized manga apps such as Tachiyomi and Manga Rock are great. They often have updated content and customizable reading settings. However, make sure to use legal and authorized sources to support the creators.
Many Chinese novel fans also recommend Z - Library. It has a vast collection of books, including Chinese novels. The advantage is that there are a lot of free resources available, but it's important to note that the legality of some of its content has been questioned in some regions. Make sure to abide by the laws in your area.
Some indie manga creators post on social media platforms like Instagram or Tumblr. But keep in mind, the reach might vary. You could also consider creating your own website or blog if you want full control over the presentation and monetization.