This is really pitiful. They are trying to dig 60 km of trenches with a small number of people with hand shovels. That will stop nothing.
Then 300 civilians have signed up and trained to be partisans (guerrillas) to oppose a Russian invasion. They will last about 15 minutes in serious combat.
It is touching to see their dedication, but I think that they need some realism.
As for the US, under Obama we will not even give them military supplies.
The only hope for Ukraine is a change in Russia; but the more a bully Putin is, the more he is liked at home, because he typifies the Russian character: a bully.