chao praya cruise or public boat?

hi! it’s my first time in bangkok soon and i’m thinking of ending one of my nights by riding a boat to see wat arun at night.

i was planning to do the dinner cruise but i dont wanna pay that much for mid food (according to reviews). im planning to go on a boat from iconsiam to chinatown and eat there instead. any thoughts on this? also, what side should i ride the boat to get the best view?

thank you!