im not the best at building templates so any advice on all of germany templates for medium tanks and a good inf one

Infantry 8, 3 Artillery and 1 anti tank is a good infantry template and a medium tank would be 4 medium 4 mot/mech 2 stug 1 tank destroyer 1 armored car

You can do a lot of variation but it's a good start for a campaign

I can sugest tank dev 2 light 4 med + mot cause they are easier for ur economy and better on the field