If you're planning to use testosterone solo, I recommend a dosage of 250-500 mg per week. If you're interested in a mass lean stack, consider combining testosterone with EQ (Equipoise) and trenbolone, along with additional oral steroids, for a duration of 8-12 weeks.
Be sure to have an aromatase inhibitor (AI) on hand for the duration of the cycle, as well as a proper post-cycle therapy (PCT) plan after completing the primary cycle.
Most importantly, after 3-4 weeks on testosterone solo, recheck your blood work to have a better understanding of your hormone levels, particularly estradiol and free testosterone.