Completely normal bro, don't sweat it. It sounds like the tranny is falling apart but that's just how it is on this car.

 

i hope not 2007 with 2500 miles lol

 

You should let the car warm up at least 5 minutes or so before driving it anyway. It would probably help that problem as well.

 

... and then there's reality.

 

If it makes you feel better, I had two Mitsus that did the same thing. Now, with my 07' Z I experienced the same thing as well. Some manual gearing during cold weather and start ups will always be rough shifting 1-3rd gear. I had even put synchromesh in my mitsu trannies and that didn't completely help.

As Cheshirecat79 was explaining, rev matching is a good habit to get into when driving a manual transmission and also feathering the shifter into gear for a smoother engagement. Thus, reducing clutch slippage and wear-n-tear on your clutch assembly.