You might check out survey companies. With decent computer skills you can get slotted in as a systems operator with some training if you work at it. (In the old days it used to be photographic skills or good map-reading but not now with GPS and digital crap). The hours are long, seven day weeks common, the overseas opportunities (in some miserable places) plenty, the pay is average but allowances often make up. If you are prepared to be 'hands on' as an all-round crew member (or an extra spanner) it can be a pretty interesting career.
Mind you, written applications from 'wannabes' get left lying around. Go visit a company or look out for a survey crew and make yourself known. When I was working full time (retired after 50 yrs in survey) I brought in several FNGs after airfield chats. Good luck.