I am timing myself to efficiently make a intermediate Trading System, that includes:
Q: How long should it take for me to make a trading system with 2 months of scripting experience?
It really depends what you mean by 2 months of scripting experience. For example, you can have 2 months of scripting experience of manipulating objects in a 3D space (CFrames, Raycasting, etc) or you could have 2 months of scripting experience dealing with datastores, etc.
Another example: if you do not have experience with RemoteEvents, then it would probably take longer for you to make a trading system.
As @incognitobot_rblx said, it entirely depends, and the answer differs for each person. Since it’s very heavily reliant on the server, with 2 months of experience I’d say roughly 2 days.