can I spend bitcoins before wallet is finished sync?

where do I find my public address?

Greetings to all....
I am new to the "bitcoin" world so please forgive me for the simple questions I am about to ask!!
My situation is that I purchased a small amount of Bitcoins and had them transferred to a Bitcoin core wallet
But the wallet hasn't sync yet. Transaction not showing up in my wallet. Balance is $0.... Been 2 days now. What should I do??
Ive read different posts here about a torrent??? Where are they found and how do I use a torrent exactly??
Thanks for your patience with a "new fish"!!!