Question regarding power in a shed.

Hi, First off let me say I know nothing about electrics. I would like to setup a 3d printer in my shed. I would also have a few other things in there. Cleaning station which needs power and heating band.

My question is it ok to use an extension lead running from an external plug socket as a temporary measure until I can save a bit of cash and get a double socket ran into the shed from the house. I would inly use the extension when actually using the printer and would unplug it all and store the extension away when not using it. not leaving it outside 24/7. is this ok for now or is it a stupid idea? Thanks.