I think you will find this group is always in favor of taking actions to improve yourself. The worst possible outcome of your efforts is that you end up where you are right now, and that's not very likely. As a mechanical engineer I can't speak specifically to civil or structural engineering, but I have worked with several of them over the years. Like most engineering disciplines, you will find a wide variety of work situations, some mostly in the field, some in an office, some for local government, some for national government, some in large private companies, some in small private companies, some self employed, some for equipment manufacturers, some for industry consultants, etc.
I say go for it. Gather the tools and skills that will put you in the position to have to make some decisions about those different options.