Normally you'd switch the power line.
if i do the first i will have to mess with 220v which im affraid of since im a newbee at this.
Use heat-shrink tubing and/or insulated terminals, etc., so it's difficult or impossible to touch the 240V wiring. Switch the hot-side (or if you're using a DPST or DPDT switch) you can switch both sides). The ground should be "permanently" connected and not switched.)
Do some research to find-out which is the hot in your country. If you're using a pre-made power cable and if you have a multimeter, check the connection (by measuring resistance) because the color codes vary.
It's reasonably safe if you do your work when it's not plugged-in and insulate everything. Worse case, you create a short and blow the circuit breaker in your house when you plug it in or turn it on.