How much resin is different from plastic sure does seem overblown - once you get used to it, there's very little to worry about difference wise.
You will want to wear a mask/respirator when you sand it - resin is very, very fine, and can get into your lungs easily.
You will want to wash it all in soapy water before you do anything - resin has a release agent on the molds that make paint slide off also, and forgeworld especially really slathers it on there.
You may have some pitting or anomolies that you need to repair - this is because resin molds are both less perfect and under less pressure than plastic molds. Sometimes, especially from
FW, you may get a piece that's just beyond the pale in terms of bad quality - if so, don't hesitate to call them about it, they are very used to it.
Superglue only, obviously.\
Resin can be made slightly malleable by putting it in warm/hot water for a bit - you can set it after bending by letting it cool or putting it in icewater.
The last thing to keep in mind is that resin tends to be way, way more brittle than plastic - use care and caution, although you will likely break something in learning this lesson, don't sweat it, just repair it and move on