Sabbath Worship I fully believe we should all keep all Sabbath, but can never get answers from those that believe in Saturday worship only the answers to my questions: Is a Sabbath a Saturday or is Saturday a Sabbath with other days also Sabbaths like: Passover and the day of Atonement and every day in the year of Jubilee?
There is a weekly Sabbath, but the other Feast days are also Sabbaths or referred to as High Sabbaths when work was also to be avoided (John 19:31) .
Are Christians today to be like the regular Jews of the Old Testament or are we to be like the priestly tribe of the Old Testament?
There are many verses that refer to God's Law as being instructions for how to walk in God's ways, such as Deuteronomy 10:12-13 and Joshua 22:5, so obedience to His commands is not about being like Jews, but about reflecting the attributes of our God. For example, in 1 Peter 1:13-16, we are are not told to have a holy conduct in order to be like Jews, but because God is holy, which is a quote from Leviticus where God was giving instructions for how to have a holy conduct, and that straightforwardly involves keeping the Sabbath holy (Leviticus 19:1-3).
Are Christians today to be that nation of priests (Ex. 19:6, 1 Peter 2:9) and not just a Jewish like nation?
Gentiles are included among God's chosen people, but have not replaced them.
Did the Priests offer up even more sacrifices and were they doing more worshipping activities on the Sabbaths? If so were the Priests keeping the Sabbath Rest? Is worship to God “work” by God’s definition?
Yes, yes, and no. There are a number of instances where some of God's laws appear to contradict, such as when priest is required to do their duties on the Sabbath or when someone wants to circumcise their baby boy on the 8th day and it happens to fall on the Sabbath. However, it was not the case that they were forced to sin by breaking one of the two commands no matter what they chose to do, but that one of the commands was never intended to prevent the other one from being obeyed, and in this instance, the Sabbath was never intended to prevent priests from doing their duties or to prevent circumcision on the 8th day, so they were held innocent. In general no command was intended to be used as an excuse to avoid obeying the greatest two commands.
We know van worship is offering up to God obedience to man’s commands, so could righteous worship be offering up to God obedience to God’s commands?
I'm not sure I completely understand your question, but submission to God is worship. There are a number of instances where the Bible says that someone bowed down a worshipped and it is not speaking about them bursting into song, but about submitting themselves to God.
If Christians are Priests, the temple of God, carrying the altar with them (cross), and constantly offering up themselves as a living sacrifice then: when are Christians not worshipping and should they ever stop?
Yes, we should worship God all the time through our actions, but this was just as true in the OT.
Did Christ expand the Old Testament commands to include our thoughts and lots more actions?
No, he did violate Deuteronomy 4:2. The OT contains the command not to covet, which pertains to our thoughts. His instructions not to have lustful thoughts towards a married woman is just the correct application of the 7th and 10th Commandments.
For the Priests what is the Sabbath Rest and so what is the Sabbath Rest to be for Christians?
The 7th day.
Some of the Jewish scholars prior to Christ seemed to have discussed (records are not perfect on this) that there was a coming “Age of Jubilee”, do you see that description fitting the Christian Dispensation we are part of?
No, that would be the Millenial reign.
I think the priests did follow the Sabbath Rest since “worship” is not work and the priests were to worship and not work all the time (the other Jews were to support them). By increasing the commands on Christians and providing a constant partner (the Spirit), Christian’s today can be in constant worship as long as what you are doing is in obedience to God’s commands and that obedience is offered up as worship, so we are in the Sabbath Rest. To suggest today we just do “Sabbath Rest” one day a week is also to suggest the other 6 days are ours?
It's good to worship all the time, but that doesn't mean that we should feel free to disobey God's commands, but rather we should worship God all the time through submitting to them.