Modern day Vs back then

I struggled to understand the bible in today's time as I feel that context matters quite a bit when reading it. I'm not sure how to structure this but I feel as though the rules/laws that applied then wouldn't apply now (not all and I understand that). This isn't specific but a boarder topic that goes into other sub-topics which I see with tattoos/piercings. I feel as though if someone who doesn't like being restricted without reasons that would fit into todays context makes them pull away from the bible and building a relationship with Gob due to the many sin and warnings of going to hell. I understand this isn't a kind of questions but more of a discussion, but any help to understand would be appreciated and with understanding comes acceptance which I hope to find.