Worship is the part of the relationship between a person and God. It varies from individual as to how they do this. Praise and meditation as well as meeting in a congregation are important. God commanded us to work six days (be thankful to Him) and rest on the seventh day (the Sabbath). Do you do this?
The first day, of course, was the day of assembly for the Israelites, not a day of worship. The seventh day Sabbath was the day they were to stay at home and not work.
Regarding the rest of the days, at 80 I don't work as hard. The Sabbath is and always was The last day of the week, but it is no longer the day of rest for Christians.