Personal trimmers are nice for the pads of the feet, but if you've never done it before and Biscuit might not like it, you might ought to stick to scissors just so he doesn't lose part of his foot pads!
Then you could work up from the scissors if it works ok.
You can use a personal trimmer or scissors between the eyes if you have that trimmed.
Use scissors for the rest of the face and just follow the outline.