Man, this question pops up all the time. Look, I get wanting to read for free, but chasing just the 'latest' chapters can put you in a bind. A lot of fan translation sites work on shaky ground. They get cease-and-desists, they vanish, or you hit a wall where the translator just... stopped. I spent a month following a series on one site, only for the last three chapters to be MIA for half a year.
The best free method with a chance at consistent updates is honestly through official publisher previews or apps that have ad-supported models. Companies like J-Novel Club often put the first volume or so of a series up for free on their site to hook you. It's not the latest, but it's stable. Some apps will let you earn points to unlock newer chapters by watching ads or doing daily logins—it's grindy, but it's legal and the updates are guaranteed. Chasing aggregators feels like a part-time job; you're always hunting for which mirror site has the current upload.
Sometimes a series gets picked up officially mid-run, and the fan translations just stop dead. Then you're stuck waiting for the official releases to catch up, which takes forever.