Pyro's a great carry if you take middle lane or solo.
Has Semi-Carry/Carry potential w/ the right items and team.
As a new player Pyro's a bit hard to play at a high level potential.
Skills: 2/1/1/3/1/4/ Max 1, then 2, then 3.
Items: Steams, Bottle, Power Supply, Portal Key, Storm Spirit, Nullstone/Sheepstick/Spellshards [Debatable based on enemy team].
It's what i go all the time ^
All preference i guess.