You don’t need to know every specification to find a starting point. Think about your experience and what you want to feel on court.
Three things to compare.
Weight & balance
Two rackets with the same weight can feel different if their balance differs. Find a combination you can manoeuvre comfortably throughout a game.
Shape & sweet spot
Round, teardrop and diamond are common shape descriptions. They are a useful first filter, but construction, balance and the individual model matter too.
Feel & construction
Core firmness and face construction affect how a racket feels. If you can, try a few options under similar conditions before committing.
This guide suggests comparison points, not a personalised product recommendation. Check the specifications of the actual model you are considering.