Ever notice sometimes your at a stoplight and all of a sudden 1st gear wont go in?
well, any other gears too.
Here’s something i tried thats not official, but works.
Find a straight away, while in 5th gear, (driving of course) Revmatch/Downshift each gears 1 by 1 til 1st gear.
After that, your gears should be loosened, and will go into gear easier.