Do you need a guide on the I-10? This trail is most traveled trails in the US, you won't want for company. There will a pretty good slug of people on the trail but finding one willing to go at your pace would be slim, or you at his. Just study your maps and read the guide book you own and you will do just fine. A lot of people do this trip solo.
What going solo means is you have to be responsible for yourself. Meaning if your body says turn around you don't go further, if the weather says turn around, you head back. You can't exceed your skill level, period.
Hmmmm...if you can't find Hollywood and Vine from Sunset and Vine you might want to cancel your trip ;-).
Bill