Don’t be taken advantage of as a tourist! They’ll look at you as easy cash and lie about how much it costs and how far things are away!
Be smart! 🙂
For travelling around the central part of Bangkok by foot, Take a taxi to Santa Cruz Church and walk up the river past Wat Kalayanamit, up to Wat Arun, take the 3.5 baht boat across the river, Wat Pho, and the Grand Palace are walkable distance from here, then finish off at the Golden Mount! Hit this last one as close to sunset as possible!
And remember to always check opening times!