I found out about this yesterday. But here’s a link to the first volume of Chi’s Sweet Home. Which I hear that is good for beginners.
just click on the red button written 無料で立ち読み and you can read it on your browser. You can also download it for free if you create an account.
This is only until the 1st of March. Plus, I’m still not sure if you download it you can keep it and read it after that date…
Edit: I forgot to mention that they have an android and pc app too.
Edit 2: I should have mentioned, but apparently they have a bunch of manga that you can read for free (with limited time). Most of them you can only read on the site, but you can also download quite a lot of them.
Here’s the link for their free manga: https://www.ebookjapan.jp/ebj/free/genre-books/?disp_type=30