Introduction, plus a levelling jack question

Hello! New guy here.. (and first post)

I'm relatively new to RVing in general, but started off with a bang.. After researching for several months, I purchased an older Komfort travel trailer and hit the road. For my second trip, my family and I took the trailer from our home, near Portland OR, all the way to NYC, hitting everything in between.. Surprisingly the only real issues I had was a broken leaf spring, and refrigerator went out, both covered by the warranty I purchased the day before the trip! Met a lot of helpful people along the way and learned a lot of tricks.

My question is regarding the standard scissor-type levelling jacks and the handles used to jack them up. I had no issues for most of the trip, and after that, the handle would break.. The screw that connects the socket to the handle would snap, requiring replacement. This happened several times. After some frustration, I just got out my cordless impact driver, connected to a socket and made a lot of noise, but it did the trick.

Obviously, I'm using too much force, but sometimes the trailer won't level without that force. What's the trick? Levelling blocks? How do you get the blocks under the tires? Do you set them how you think it will be then drive on them, check for level, move, add blocks and drive on them again?

Thanks for the help that this forum provided while I was in my research phase of my journey.