Last year after the celebration of the Triduum (the three days before Easter) I recall speaking to someone about the Easter Mass. He said, "Easter almost feels like a let-down". I knew exactly what he was speaking about; have you ever felt that way? What he was referring to was the fact that the Easter Mass comes after Holy Thursday, Good Friday, and the Easter Vigil (all of which are very different services from the normal Sunday Mass). It almost feels like Easter is "just ordinary" after all the different ceremonies of the Triduum.
That is actually the way that it is supposed to be, though we do not usually think of it like that. You need to understand that all the other 51 Sundays of the year are designed to be a "little Easter" and therefore are patterned after the original source for Sunday Mass: Easter Day. Easter is the norm, and the others are the copies (so that we can continue to celebrate the resurrection of Christ every Sunday of the year). So it is not a "let-down" exactly; it would be better to say that on Easter we return to "normal".
This does not mean, however, that we are supposed to allow ourselves to get bored with the normal pattern of Sunday Mass; especially this Sunday. The Easter season goes from Easter Sunday until Pentecost (May 31st this year), but the seven days after Easter are counted as part of Easter. This means that we are still celebrating Easter today; do not think that it has ended. Today being "Divine Mercy Sunday" is the conclusion of the real Easter celebration (this is also why you did not need to practice your weekly Friday abstinence last Friday).
In the gospel reading for today, Jesus set this pattern for the Apostles. He came to visit them first on the "evening of the first day of the week" (the first Easter). In other words, He came on the Sunday of His resurrection. Then He came "eight days later" (on "Divine Mercy Sunday") and appeared to them once again. He came to them as He comes to each of us on every Sunday (even if we cannot gather for Mass!). He comes to you and your family today. He approaches you in your very homes and says "Peace be with you".
When He comes to you today, He wants to find you keeping the pattern of Sundays. He wants to see you doing all you can to maintain the Lord's Day as a day of rest and worship. He wants you to say the rosary, or read the Scripture readings for today. He wants to find you being with your family (as much as you can). He wants to find you remembering that wherever we are, whatever we are doing, and however difficult the times are that we are going through, that we acknowledge that He is our Lord, and that "this is the day the Lord has made, let us be glad and rejoice in it". And He wants to give you His peace. In the name ✠ of the Father, and of the Son, and of the Holy Ghost. Amen.