Your free to do what you want which includes disregarding every scripture reference. However, there is a clear commandment for Sabbath keeping Exodus 20:8-11. There is no scripture or commandment for Sunday keeping. Sunday worship is a tradition of man and not a commandment and Jesus gives us this clear warning- worshipping in vain by keeping traditions over obeying the commandments of God. Matthew 15:3-9
Sunday is not a day that is holy to God or a day God declared holy for us, nor is it a day God blessed or sanctified. God Sabbath is more than a day of rest but that is part of it. We are shown throughout the Bible how the keep the Sabbath holy. Genesis 2:1-3, Exodus 20:8-11, Acts 18:4. Luke 4:16, Isaiah 58:13, Lev 23:3, Isaiah 66:23
If you do not want to worship God on the Sabbath now- what makes you think you will suddenly want to on the New Earth and New Heaven, because the Sabbath will continue to be God's chosen day of worship for eternity Isaiah 66:23 as promised Exodus 31:16 and will not be new for God's saints who still keep the commandments of God Revelations 14:12. God does not have a different will for us in heaven as He does for us on earth if you read the Lords prayer and how Jesus taught us to pray.
The first day is a working day according to God Exodus 20:9 so why would you deem that day the day of worship when God did not bless the first day, or sanctify it, or declared it the holy day of the Lord thy God? God only reserved this for the Sabbath day. This teaching that God wants us to keep a different day that is holy to God, did not come from God. We are made in the image of God and we are to follow in the path of our Savior, not do something different.