Nightmare machines to change a seal on I'm afraid.
On the front panel, you simply pull the plastic retainer off.
Then, twist it to open it.
On the tub side of the seal, you pull it off and then retrieve the spring from the groove in the seal.
Then, the nightmare begins, trying to fit the door seal through the door aperture.
Once the seal is onto the outer tub, you have to fit the spring into the groove around the seal.
The only tip I can give you for this, is tilt the machine rearward so the drum falls back.
It gives you an inch or two extra working space.
It's a very difficult seal to change.
Good luck with it, hope this helps