Here is some advice not yet posted. Make use of this website:
https://www.vinylengine.com/turntable-database.php
Find the turntable you are looking for and check the specs for rumble and wow and flutter. The better the specs the better the turntable. It doesn't give you everything you need to make a decision but it will certainly sort the entry level turntables from the really fine ones.
What to look for:
Rumble:
This is the amount of low frequency noise the turntable produces. It is also sometimes called the Signal to Noise ratio. The rumble will be shown as a negative number and signal to noise as positive. So -75 dB rumble is the same as 75 dB signal to noise. Larger numbers mean a quieter machine. For reference, one of the best of the consumer grade turntables, the Technics SL1200 was -75 dB. Entry level is around -45 dB or so.
Wow and Flutter
This is speed stability. How well does the turntable hold speed with speeding up. It is measured as a percentage and the lower the percentage the better. The Technics mentioned above managed to get to 0.025%. Few belt drives that I have considered get that low but don't let that stop you. There are a lot around that can get better then 0.1 %, but you don't want to go worse then that.
Once you settle on a turntable, that site may have both the owner's and service manual. You need to register to download them but that's free and they don't ever spam you, so it's well worth it.
Good Luck
Shelly_D