Right, varies from headset to headset depending on quality. From what i can see in a pic of a standard blade, you have a standard aheadset. On your old fork you will have a lower headset raced pressed onto it, remove that using a hammer and screwdriver, knocking around the circumference gently, dont hit the same area all the time as it wont come off and you will damage the race, also make sure you dont hit where the bearings make contact as this will make the headset feel rough when reassembled. Once the race is off, get your new forks and slide the race on, you will then need to tap it onto the bottom of the steerer (itll be thicker there and so gentle taps again until its on). I use a headtube off a bike that used 1inch forks to tap my races on, it works nicely
For if you have sealed bearings
Left hand side if you have open bearings.