Shabbat Shalom to all Sabbath keepers ! From dusk Friday until dusk on Saturday is the Biblical Sabbath - not Sunday. May I respectfully suggest a website created by a man I believe Elohim had me cross paths with during my frustrations of trying to find Biblical truth and not finding it in any mainstream churches - their “dogma” not aligning with what Scripture actually says in many areas.
everlastingkingdom.info is the site - see if it doesn’t resonate as truth in your spirit
Shalom