Question for construction workers

Hello houston construction workers, i recently turned 18 and looking forward to start working now as soon as possible, both of my parents left me with my grandmother when i was 15, i have been living with my grandmother since then, and have been landscaping with a friend since 16 and have saved up 5k and have a small old 2002 nissan, i dont want to keep living this life i dont want to keep living with my grandmother, i feel useless… i always liked seeing bridges in construction and always had a dream of working on bridges i do know its really heavy work but at this point i dont actually really care if i suffer, i wont be going to college because i know i wont be able to afford it right now, i have been helping my grandmother with paying bills, food, gasoline and other expenses, i end up with little money and save that, i end up with no money at all to go out… well getting back to the point i just wanted to know how and where here in houston can i find a job in heavy civil construction, like in bridges or something heavy civil. Thank you in advance