Dont want any charge of anything

Hi, i only started my aws account to try some things. It was one or two. Now, i dont want to be charged fr things, i dont even remember i tried. I find it impossible to understand, wheter i'll be charged or not. When i tried one of the last posts recommendations, i found that i have like 156 resources when i searched in the tag editor.

Plz, i want to know what to do! Im really lost.