Lots of folks on this Forum have done the Tampico trip you're talking about (Cuidad Valles area, really). It's a very doable trip without guides, although solo cars without shuttles can mean multiple days paddling Micos or El Salto because they can be hitchhiked or walked. Most, if not all the put-ins can be found with some directions and maps from Buzz Mexi-veterans. But mid-January tends to be pretty much dried up for those rivers near Valles, unfortunately. This time of year (November / early December) is prime season. I've been down there after Jan 1st, and the pickings are slim. Micos was barely runnable, and options like the Verde, Santa Maria, Ojo Frio and the Gallinas are too low.
You might get lucky with rain, and El Salto is dam-released and runs regularly. So it not like it's not possible. But you should take a look at the Sierra Rios site to see what the flows are for January, because that area might be more reliable in flows due to the proximity to the Pacific.