Hi! I am somewhat new traveler, I've been to Europe once and places in central America. I am doing a Thailand/ Vietnam trip this year and want to do both, I am thinking of doing 4 days in Chiang Mai, 5 days Hanoi (with some day trips around) and 3 days in Da Nang. Is that a decent path? I am wanting to do Mountains/beach/ and city.

Is there anything I am super missing out on if I do this? I am interested in Bangkok but I do not think I'll have the time, lol!