If you have electricity but no gas in your home, you most likely have a hot water cylinder which will contain about 120 litres of water that will be heated by an immersion heater of which you will only see the round cap, in black plastic or grey metal, sticking out of the top, or possiblly the side, of the cylinder. There is a thermostat to set water temperature under the cap. Turn off electricity and use a torch if removing the cap.
The cylinder will almost certainly be supplied with cold water from a tank in the loft which is probably black plastic, but might be galvanised steel if very old (and likely to be rusty and leak).
The cylinder ought to be insulated; depending on its age, this might be a red jacket, or a coating of stiff plastic foam applied in the factory, either yellow, green or blue. The immersion heater will be attached by a thick rubbery flexible cable, usually white, going to a switch on the wall which might have an indicating neon light on it.
Heating water by electricity is very quite expensive, so please tell me if you have found the cylinder, what colour the insulation is, are the copper pipes around it insulated; is there one immersion heater at the top, or two in the side, and can you see a timer near the switch.
The cylinder is usually in an airing cupboard which is warm and dry and used for storage of washed clothes, sheets etc.
I'd also suggest you take a note of your meter readings and write them in your diary to keep a track of cost. You can provide these readings online to your electricity supplier as often as you like to prevent estimated bills. I don't know if in your country, as here, you can change the contract and supplier of your electricity to get the best bargain. The meter and the distribution network are "rented" by their operator to ther electricity supplier, you only pay the supplier, and the network operator doesn't mind which supplier you use.