Yea I'm scared all the time. This jobs nuts. But if I'm gonna be in a tree for over three hours I'll make a point to do a detailed gear inspection with emphasis on my climbing line. I'll bounce test my tie in point with someone else and or ask another climbers opinion on my crotch selection. I'll climb srt with a base tie and direct my line on a few redirects either in the tree or with the throw ball. I'll use drt techniques when past 40 degrees. I'll start on easier parts of the tree as to get acquainted with it first. last and my favorite I'll swear under my breath the whole time blaming the sales guy, and the company for putting me in this position
Climbing SRT can solve a lot of the anchor uncertainty. Anchor redundancy justifies confidence. If you were cleaning very large boulders from a new rock climb you probably would not put your anchor amidst them. You would descend from above, using the best anchor that your rope length permits. Yet climbing line anchors in tree removals are routinely placed in vicinity of the cutting action.
Stay within your comfort zone. I just started climbing freshly dead pines in year 4. It's a lot to think about in terms of potential root decay and rigging forces. I will not climb just any dead pine unless I know I've got game on it. I'm also crane climbing this Monday for the first time. I've been studying it for a year, got two small trees under contract a month ago, and have rehearsed every cut in my mind hundreds of times. That may be overkill for others, but it's where I'm at in order to be comfortable. Tell your supervisor that you'll climb what you're comfortable climbing. If he doesn't like it, incorporate your business with a bicycle, ms 192t, and Stein arbor trolley, profit first business strategy, and make some. You'll never go back to working for someone else.