On the wild foods: not sure what you have in mind here exactly. I've been into them for years, and can share a couple of points that might be useful. One is that it is much more practical to carry one or more staples that will provide most of your calories, rather than to rely exclusively on wild foods. Oats would be an example. You can find a lot of wild greens in winter, in some parts of California. They are very nutritious but cannot provide many calories. There are wild mushrooms, but you shouldn't try any but the safest until you get more experience. Like the greens, they can't provide many calories. You need plenty of calories on a long trip.

Acorns can still be found in some areas, but January is late. The bounty has peaked and fallen off. Gathering, shelling, and leaching out the tannins is very labor intensive and time consuming.

During the summer and fall you can live on wild foods in some parts of California, but it's much harder in winter.

There are good online wild food resources you can access or download to a phone, Kindle, or tablet.

You can probably find more practcal information in the backpacking literature (including online) than in the survival literature. Some of the survival stuff is ok, but the backpackers seem to have more relevant and practical and tested and evolved knowledge that is more applicable and workable. Bikepackers too. And the more camping- and wilderness-oriented among the bike touring people. There is a good dedicated website for bikepackers and bikepacking. You could probably learn quite a bit there also. They tend to keep their loads light. A lot of the survival types are behind the curve, and weighed down unnecessarily with less than optimal gear (a lot of the military gear is almost absurdly heavy), among other things. Bikepackers tend to keep it light, and have better, more helpful ideas for your trip.