If you don't have a clear understanding, how do you know there is anything to worship, or that, if there is, it is worthy of worship? (I mean this as a sincere question - if you worship, you are putting some time and energy into an activity, and since you say you are unsure about much of it, I'm curious why you feel it important to invest yourself.)
To use an analogy, scientists need not have a clear understanding of something to experiment. Climate Change scientists observed that something was going on, but they did not have a clear understanding of the details and mechanisms. I find the answer to the question "Why is there something rather than nothing?" that there is something qualitatively different to this something, something amazing if it is responsible for the universe. Worship understood as appreciating the jaw-dropping amazingness of something carries a lot of weight with me. Now, of course, this only applies so far only to a deist god. And I understand that this is not convincing, but it is plausible.
My own experiences in prayer, alone and with others, and what other people (whom I trust and I don't trust easily, especially with religious claims) have said, lead me to think that it is possible to relate to this Other and that there are effects. There is no point in me recounting any because you have no reason to take me seriously, as an anonymous person. I think that it is possible that some of these effects are the product of my brain only, but some of these phenomena do not just occur within the confines of a skull. I am well aware of the hysteria and manipulation that can create wonderful feelings in concerts etc, but I am very resistant to emotional manipulation and dislike it intensely.
I think that people of other faiths, and none, may experience the divine.
And why do you not find the possibility that Jesus was just a flesh-and-blood person "convincing"? Surely that is the simplest answer? Why would all other stories of magical people be false but this one be true?
It's a variety of reasons, of which the plausibility of a deist god, combined with personal experiences, the good that can come from religion and the continuity of Xtian communities from the time of Jesus.
Sigh, I find communicating on the internet so frustrating as it is slow and anonymous. I am well aware that this is far from convincing to someone else, but that is partly because it would take a lot of time and effort to go into all the details which would show that I am as sane as you.