TRT preferably a last resort. It's better to try less interventionist approaches first.
First is examine your lifestyle. Try to keep your waistline below 100cm and neck circumference below 40cm. Restrict alcohol intake, especially before bed. Don't smoke. Minimize work stress. Embark on an exercise program, it will get easier as you go.
Second, do a sleep study and check for sleep apnea, it's a major disrupter of hormonal function.
Then check for gluten intolerance. Conditions such as Celiacs disease are under diagnosed and lead to fatigue, similar to what you seem to be experiencing.
Correct these if applicable and then re-check testosterone count before starting any TRT.