No need to be troubled! There is a lot of good news and you are right to investigate what does the Bible say before leaping into a denomination.
I do not feel that God made anything confusing, especially about His seventh-day Sabbath. He actually wrote the commandment with His own finger! The only scripture in the entire Bible written by God are His 10 commandment. The perfect way to show God our love (commandments 1-4) and how to treat each other (commandments 5-10)
Here is the 4th commandment:
Exodus 20: 8 “Remember the Sabbath day, to keep it holy. 9 Six days you shall labor and do all your work, 10
but the seventh day is the Sabbath of the Lord your God.
In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who
is within your gates. 11 For
in six days the Lord made the heavens and the earth, the sea, and all that
is in them, and
rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.
Can't get much clearer. The seventh day was always set apart as His Holy day from creation:
Genesis 2:3 3 Then God blessed the seventh day and sanctified it, because in it He rested from all His work which God had created and made.
Why the confusion? The confusion is not coming from God. Satan wants to make a counterfeit to everything God created, so a counterfeit day of worship makes sense for these reasons. In the Bible you will not find the first day (Sunday) a day that God sanctified, Blessed, called Holy, a day of rest and He also asked us to Remember.
Jesus and His disciples kept the commandments of God and Sabbath. Sabbath is mentioned in the New Testament over 60 times. Here are just a few examples:
And now when the even was come, because it was the preparation, that is, the day before the
sabbath,
- Mark 15:42
And it came to pass also on another
sabbath, that he entered into the synagogue and taught: and there was a man whose right hand was withered.
- Luke 6:6
And he was teaching in one of the synagogues on the
sabbath.
- Luke 13:10
And they returned, and prepared spices and ointments;
and rested the sabbath day according to the commandment.
- Luke 23:56 (This confirms the commandment in the New Testament)
This also seems pretty clear:
Mark 2:27
And He said to them, “The Sabbath was made for man, and not man for the Sabbath.
Jesus told us the Sabbath was made for all of us.
It's not too hard to find out why the majority worship on the first day, the Catholic church admits they changed the day God asked us to keep Holy from Saturday to the first day Sunday and they admit they did this with no Biblical authority:
Had she not such power, she could not have done that in which all modern religionists agree with her; —she could not have substituted the observance of
Sunday the first day of the week, for the observance of Saturday the Seventh day, a
change for which there is no Scriptural authority.
—Rev. Stephen Keenan, A Doctrinal Catechism; New York in 1857, page 174
So the question is do you follow God or do you follow the traditions of man.
Here is a website that has everything you need to know about the Sabbath
What day is the Sabbath and does it matter? | Sabbath Truth
I pray this information helps.
God Bless