Autumn is the best season for trekking in Nepal due to various reasons. It has suitable weather, climate, incredible views, more accommodation options and many more.
Since this is the peak season for trekking in Nepal, you need to book for the trekking accommodation, accessibility, and services in advance.
Try to be more interactive with locals and other trekkers for better experience. Try to select the best and unique trekking destination that is suitable for your physical fitness.