In order to understand the real answer on this we need to have a bit of a history lesson:
Christianity really started around 20AD. From that time until 1053AD what evolved was a centralized church. This centralized church developed some political doctrines and some “bosses” or church heads, and depending on where you lived, there were different bosses. The boss in the eastern portion of the church was the patriarch Michael Cerularius and the boss in the west (controlled by Rome) was Pope Leo IX.
The big disagreement here was over who was the real boss, what kind of bread to use for communion, a small change in the wording of the Nicene creed, celebacy of religious leaders and purgatory, among other political views. There was a great split that occurred, or what we call “The great schism” where 2 giant religious factions were created, the Eastern Orthodox church and the Roman Catholic church. The head of each faction excommunicated one another just for spite.
Later on, in 1517, a Saxony (now Germany) priest named Martin Luther was fed up with some of the corruption and political involvements of the Roman Catholic church (selling absolutions, etc) and came up with 95 theses which he nailed to the church doors in protest. This was really the beginning of the Protestant Reformation. The people who followed Martin Luther were called “Lutherans”.
As the reformation spread across countries other reformers ideas cropped up and their followers, of course, broke off into further factions or “denominations”. These denominations were originally largely regional but today are almost all world wide. While the differences between all those denominations are interesting and sometimes heated, by and large, they all teach salvation through Christ by faith and the Bible as God’s word.
And that leaves us at today where there are many many Protestant “denominations” a person can belong to and 2 “Catholic” churches. So that brings us back to our original question, which one is the right one? Which denomination?
Given that your denomination teaches salvation through Jesus Christ through faith (which the Bible, God’s word, spells out for us explicitly in Ephesians 2:8) the rest is not as significant. You might visit some congregations and see which makes you feel welcome. See which speaks to you. You might take some time and dig into the differences between some denominations – some are fascinating, and see what speaks to you. You can spend some time talking to God about it, but the real answer is all of them and none of them at the same time. They all have something to offer and none of them are exactly right as they are all based in some way on the ideas of people and we must strive to base our Christianity on the ideas of Jesus.