I am sort of the opposite as I do not enjoy the jitters and am not one of the jittery types. If I am nervous or jittery, I usually choose to not fly. Nervousness when flying a new plane has only happened to me a few times and I have learned that if I am nervous there is something else wrong and it is not the best time to maiden a plane. I will usually land the plane immediately and take a break. I may be too tired, or need to chill out or something else is affecting me.
Sometimes I think we over set our expectations and we can cause ourselves issues. Anticipation can play into this as well. If you have flown and are reasonably decent at it you should be able to maiden a plane. I have maidened several now and have not had but one catastrophic event and that was my fault because my ailerons were reversed. I would still have that plane had I been observant and checked behind myself. I was not nervous at all though when I took off. I was somewhat disappointed that I lost the plane.
When I maiden a plane I am very confident in my setup and usually no issues occur. I do check my ailerons better now

One thing that I find is very important is once you have maidened the plane is to do post flight checks. Things can get loose and that is when a thorough checkover can expose something that will save your plane.
Some guys maiden anyone's plane. I don't feel comfortable maidening anyone else's plane, much less my own. I do admire the guys that can maiden anything though. Some guys can fly an inner tube