Congrats on your first book 
As it was already mentioned, you may try out Bookwalker for digital reading. For many of their books they have a free preview and WK community may also keep you posted on freebies or limited promotions.
In case you settle for 日常: just want to mention we had a bookclub about it here last year.
Apart from that, wasabi has the Black Jack ni yoroshiku series for immersive reading which might be a nice fit for your level as well.
Anyways, good luck with your further readings 