I don’t mean to be a smartass, but another thing that helps tremendously is to do it in August when its 90 instead of 9.
Unions can also be your friend. Assemble everything, cut the pex to fit over the adapter already screwed into the union, take the union apart, slide into pex and crimp, then man handle the union back into place. A hair dryer or heat gun also helps.
What also works well is if you have a variable setting heat gun. I have one actually meant for welding rubber roofs. Set it at 190F and place in the end of the pex and let it run awhile.
Finished a job last month that used 1 1/4” pex. Brought the roll in and sat it on the register closest to the furnace for several days, From their into the already preheated pickup cab, got to the job and left the truck run. Was still a rotten SOB to fight. A cousins husband owed me several favors so he was helping. He was unrolling it and it got away from him and smacked em right in the jewels, couldn’t tell if he was gonna cry or puke, so at least was some entertainment on the job. That was the outer layer on the roll, the inner one was ten times worse. If a person was a good catholic I’d suggest heading to confession before even starting the job as your gonna utter several sins before done.