First off Welcome and congrats on the RV.
#1-NO! #2-YES --OK you should lift the tongue up to relieve pressure from the spring bars. Then remove the spring bars. Then lower the tongue to take weight off the tongue jack-loosen the coupler. Then lift tongue again, till it becomes loosed from the ball. Drive truck forward. #2 part 2-YES remove the bars from the unit, and place in storage/truck bed/ETC.
#3-Well here goes. If you can, get a level and get the trailer level at home. Then buy 2 small "sticky" levels. Place one on the front of the trailer, place the other on one side of the trailer. -- Then when you get to the campsite, level side-to-side first, by driving the trailer on wood/lego blocks/concrete/ETC till the front level shows level. Unhook (including spring bars), then level front-to-back using tongue jack, till the level on the side says level.
Have a blast in your RV
I started with nothing, and still have most of it left
2001 Jayco KIWI 23B
2003 Jeep Grand Cherokee 4.7 AWD