Swarfega is soap? Never use soap, thát makes your rim rust, always use special tyre grease or tyresoap, available at any tyrecentre and carshop. It's cheap, and I use the same pot since the stone age.
Use pieces of garden hose, slit lengthwise, to protect your rim.
1. warm may be easier, never do it myself.
2. also grease the tyre edge, not only the rim.
3 and 4. okay, i always put (some) air in the tube, to keep it far from the edges.
5.using levers is good, use long ones, ( it is like hammers, it's better to hit softly with a big hammer than hard with a small one,) be smart and lube them too.
And puncture repair kits are cheapest at most bicycleshops....