Congrats. I look forward to reading about your first straight razor shave.
Proper skin stretching techniques make a huge impact on the quality of the shave. Watch a couple of videos to get a feel for which direction to pull your skin.
Focus on with the grain (WTG), which you probably already know. But, let me emphasize the importance of WTG even more. It sets up the rest of the shave. You might consider shaving WTG twice. Or, WTG the first pass, and if you are going to continue shaving, maybe shave the second pass WTG plus 45 degrees.