Thank you SO MUCH!
That makes things a lot clearer, now that you mention it. Standing during the Lord's Prayer might be awkward at first but it's a good way to abstain. Like you said, I don't believe in Jesus as my HP - my HP is G-d, the G-d of Abraham. Thanks for the suggestions about Kiddush and holidays as well - at home I can just use grape juice but if I'm at services, I just won't partake.
Again, thanks so much!