bicwang

Buses and minibuses are available but they'll most likely run through the Laem Chabang area (especially with Roong Reung Coach). Doubt they'll save you any time.

Not sure about Skytrains and so on, but Thai Smile Bus (TSB Go) app is quite useful. Has all the routes and bus stops. You can also get a bus card from them and add credit through the app, fares cut off at a maximum of 25 baht a day if you have a card. If you need to check out the different public transit routes in Bangkok, https://www.bangkoktransitmap.com/ is quite a good resource, although it doesn't show the timings.

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