Even just one oral will shut you down the same as 5 grams of testosterone and tren.
Have a look at the symptoms of low t. If you really feel you have them try and get your levels tested. Then go from there.
Although lack of facial hair is common amongst high t men also. I couldnt grow anything on my face and am now enjoying a relatively thick facial hair where it grows since starting testosterone.
You are old enough to make your own decisions. I highly reccomend going through every thread in this post before starting to research your cycle.
You can likely get into the shape you like for your holiday naturally so dont trade hormonal health and possibly life altering effects for a set of abs.