Some girls here have taken Testosterone. The reasons they give are to increase confidence and libido. It will also increase your muscular strength.
Low dose testosterone to keep you in the female range can be done safely, but needs to be monitored by a doctor with experience in hormone replacement. Without good monitoring of your blood levels, you can easily slip into the male range and begin to look like a female body builder.
I know of some women who use the Testosterone implanted pellets to raise their Testosterone into the female range.
Best wishes on whatever you decide to do. Keep safe.