First turntable advice

Stay with your preference to buy used. Turntable rigs are popular so there is a wider audience for upgradeitis. You didn't state your budget but, whatever it is, you will get more for your money used, here on Audiogon. If practical, buy locally so that you can audition the setup. Check the synergy between table, arm and cartridge. Again, this is most apparent during audition. Also, if you buy locally you can carry it home yourself versus trusting common carriers. Don't be surprised if your focus changes from digital to analog.

Don't buy used, you already said you know nothing about turntables, buy a new one with cartridge already installed.

A new $299 TT with cart correctly installed will sound better than the best one in the world without the cartridge correctly installed, and the chance in buying a used table set-up right is one in 10.

If you have a limited budget or don't trust your own ears, then by all means, follow Schubert's advice.

Thanks for the advice. I'm still debating. How would pro-ject carbon debut compare to rega p6 with rega cartridge. Obviously much more expensive

Project would sound better IF you put a better cart like a Nagoka, Denon etc. Rega probaly would if you did the same. Its your money.
IMO Rega carts are dogs.