My dear Mr. Tableux,
The masculinizing power of testosterone is real! I sometimes see genetic men whose facial features would make them flawless females -but- they appear male because of facial hair, male hairstyles, speech, gestures, mannerisms, etc. At the age of 17, I was still blessed to not yet be showing signs of male pubescence (My gender dysphoria was very low & tolerable at that point) & I had no facial hair, a porcelain complexion, gorgeously thick hair, delicate features, etc. I was at the peak of my natural beauty - Had I just worn my hair long in those days I would have very closely resembled Yvonne Craig

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One year later (POW!), testosterone made its entrance! It seems I suddenly had facial hair, noticeable muscle development on my arms and shoulders, a masculinizing face, & I started appearing more and more male within a couple of years. Those changes hurled me into profound dysphoria (Yikes!).
I am an MTF & if I could somehow bottle up my natural T & genetic male physiology & transfer it to you, believe me mister, I most happily would. Oh dear, I've prattled on long enough here. In short, T & strength training exercises should bring about phenomenal masculinization in you. Godspeed.