PCB design software for beginners

MarkT:
Lack of space, or not setting the auto-route grid fine enough.

The eagle autorouter seems not to handle power separate from signals, so
I'd at least hand-route the power first, add a ground plane, then autoroute
the signals. Power traces should be wider than signals, note, and you should
endevour to get those decoupling capacitors close to the power pins.

Thanks Mark, will check it

add a 0.1uC cap to the Vcc pin of each powered device to Gnd.

Can it be a polyester 0.1uf?
I'm not familiarized with capacitors values and types