Where I live, most road bikes has a 90kg weight limitation (cyclist + accessories), some only 85kg weight limitation
If this is going to be the first trip, you may be a little too ambitious for a cyclist of your weight even if its all flat road/terrain cycling in fine weather with multi-speed hybrid bike (your weight alone may damage a regular road bike beyond repair, and you get hurt by the fall)
Can I recommend that your lose weight further before such an adventure. You can get hyponatremia more easily than many/most others with your weight