[Sandman]

Jomon is a probably not a good choice for a beginner, all its troops are bitterly resource intensive and not that great.

A temple is every province is a terrible waste of money if you're struggling, you could buy forty basic human infantry for the cost of each one. The same is true for 20 PD in every province; it's a common mistake for novices to invest in huge PD forces, rather than researchers, forts and mobile armies. 20 PD is reasonable for key provinces, but it's a bit much for unthreatened interior areas.

Three researchers is very poor for the middle of the second year, although Jomon doesn't have good mages to begin with.

And your taxes will take care of themselves. Don't touch them unless you really have to.