The sump plug is located on the base of the engine
You will need to release the access panel retainer - use a screwdriver
Don't forget to place a suitably sized receiving tray beneath
Using a 17mm spanner or socket, carefully remove the sump plug and fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel and refit a new sump plug and washer
Do not over tighten. Refit access panel