Before you start down that road, consider whether there is anything going on right now that might be causing your low T. In winter 2013, I tested 225-250 on 3 consecutive tests. I was working 12-15 hour shifts at work with 60+ hours per week and making my way through the shift by carb loading on Wawa subs and donuts. I ate 1 real meal (e.g. meat, starch, veggie) per day; the rest of my food intake was comprised of PBJs, whey protein, and crap from Wawa. To top it off, I was getting 4.5-6 hours of sleep per night and foolishly trying to get my workouts in before work several days per week.
I finally crashed and burned in December. I couldn't make it more than 15 minutes through a workout and, ultimately, I took nearly 2 months off, which is something I hadn't done in nearly a decade. I started down the TRT road out of desperation several months later, but quickly changed my mind after my body started aromatizing at a ridiculous rate. I went back to the drawing board; I got my diet, sleep, and workouts back in check. I was feeling good after a couple months so I skipped the bloodwork and just got it done last month. I'm currently at ~650 (I'm 37 btw).
So long story short, make sure you've got your diet, sleep, workouts, etc. dialed in for several months and then get your T checked again before committing to TRT for life.