This is a high-altitude climb and if you are not an experienced trekker then it would be a bad idea to climb Mera Peak as a first high-altitude trek. Or if you are physically strong and trekked to other high-altitude places like Everest base camp, then climbing Mera Peak is a realistic next challenge. It is designated by the Nepal Mountaineering Association as a trekking peak. Their criteria for this, however, is only that you need to be able to use crampons and an ice axe to reach the summit. This can give the impression that Mera Peak is not difficult. This is not true.  At 6476m it is the highest trekking peak in Nepal, and this brings all the challenges of trekking at a really high altitude. These include the possibility of extreme weather conditions, and of course, altitude sickness. If you haven’t already been to altitudes above 4000m without any problems then you should probably avoid Mera Peak. In total, you will be at, or above, 5000m for 4 days, and unless you acclimatize well this could easily trigger altitude sickness.