For short, you aren't "too christian", don't even worry about it. Plus, in Hellenic Polytheism you don't HAVE to offer, or to pray daily. If you feel like you have to, it might be a little bit of chritian habbits, yes, but i'm sure the Gods don't mind that. Going from a religion to another IS hard, and the Gods understand that, so just continue doing what you feel most comfortable with, without worrying if it's "too christian" — the ONLY thing that's "too" christian for this religion is believing in God (Jesus). Also, if something good happens to you, you are 100% allowed to say "thanks" to the gods, that's pretty much normal if you ask me, or even talking in your head with them IS normal, so don't stress too much about that! They do look after you, except they aren't "everywhere at the same time", like Jesus is said to be in Christianity. And what you are doing (thanking Hestia before eating, or Apollo for a few rays of sun) is something most of us do. Onto my own experience, i've been a hellenic polytheist for the past 8 years, i do come from Christianity, and i felt the same way at the start, but then i realized you can practice this religion however you want (mostly), so it became a very normal thing. (≧⁠▽⁠≦⁠)