I changed the transmission fluid in my car the other day.
And I did it all by myself.

It went really well and didn't take any more than like an hour.
Of course I had to phone a freind and confirm which plug first, I almost drained the oil

But after overcoming a little stumble at first, it went very smoothly.
And it solved most of the grinding issues I had.
I still grind a little bit if I go full force into 2nd, but I can work with that.