Do you have any suggestions of books on entry level economics aiming to help one grasp economic theories and terminology, as well as familiarise with the evolution of economic systems/thought through history?
That's a big set of topics, right there!
To get you started, if you want a short generalist introductory work for economic history, try Robert (Bob) Allen's Global Economic History: A Very Short Introduction. If you want a fuller, broader general treatment of world economic history, perhaps try Findlay and O'Rourke, Power and Plenty: Trade, War and the World Economy in the Second Millennium.