Welcome to SRP.

Two things that worked well for me for sideburns:

1. Use spine of blade to outline sideburns in lather.

2. Stretch with off hand overhead, i.e. left hand to stretch above right sideburn. Looks silly, but gives you an unobstructed view of that area.

Seach the Wiki for "shaving videos", we have quite a few good ones in there.

Good luck, and keep us posted on your progress.

Regards,
Robin