I tried, I hope this is what you wanted done!
I’m not a woman. I’m a lusty young man. (This sentence can be taken in a strange way, so I suggest you use passionate man instead of lusty, like you did in the last sentence).
I begin my day by working out at gyms. That way, I could develop the strength to stay up all night.
On top of that, I walked ‘Camino de Santiago’ which is an route of about 900km in Northern Spain, enduring the sunlight of summer and the geothermal heat of the asphalt. For 33 days, I walked with a heavy backpack weighing 10kg and it led to a lot of blisters on my feet.
However, I didn’t give up the responsibility to complete my challenge and finished it.
Although it was a challenge for my hobby, this mental patience and physical strength could be a good stepping stone for carrying out my internship.
I will do my internship as a passionate young man, not a woman.