One great place to read light novels is in a cozy corner of your local library. Libraries usually have a good selection of light novels, and the quiet environment is perfect for getting lost in the stories. Another option is in a park on a sunny day. You can sit on a bench under a tree and enjoy the fresh air while reading. Also, your own bedroom can be a great place. You can make it as comfortable as you like, with soft pillows and warm blankets, and read without any distractions.
Archive of Our Own (AO3) is a great place. It has a vast collection of fanfictions across various fandoms. The tagging system is very detailed, which makes it easy to find exactly what you're looking for.
In my opinion, a mountain top is a really cool place to read light novels outdoors. You can get a great view while reading, and the fresh air at high altitudes is invigorating. Another option is a forest glade. It's quiet and surrounded by nature. You can listen to the birds chirping as you read. Also, a riverside is very nice. You can watch the flowing water and read at your own pace.
I think a cemetery at night might seem like an appropriate place, but it's not really safe or legal in most cases. So, perhaps a park bench under a big, old tree on a cloudy day could also be a good spot. The natural elements like the rustling of leaves and the gloominess can add to the mood while reading ghost stories.
AO3 is an excellent place. It has a large collection of fanfiction from various fandoms, including the Finder series. The tagging system there makes it easy to find exactly what you're looking for.
Websites like Viz Media and Webtoons are also worth checking out. Viz Media has licensed manga, and Webtoons has some unique and interesting manga-style comics. Just make sure to follow the site's rules and terms of use.