You can use a taxi to get there /back . It is easy to handle the paperwork .I went there with my Thai wife and it was an easy process .There are plenty of people offering the translation services ( as has been said) Good Luck.
He has a point ? The cross bridges have very steep concrete steps . Also please note crossing a road in Bangok /Thailand is not like the UK. A lot of Thai motorists ignore people on crossings , So be very cautious ( If you think I am being Melodramatic - There has been a case where A Policeman on ran down a person and killed them).