Resin is similar to plastic to work with. The main difference is you have to use either CA (superglue) or a two part apoxy glue to fix it similar to glueing brass or other metals togeather.
The main difference is that the dust if inhaled is dangerous to your heath and either a mask or something similar is recommended when sanding. Or wet sand it to keep the dust down. I always wash my hands after working with resin as well.
Before painting wash the parts as they often have mold release agents on them and this stops the paint from sticking. I also prefer to prime or paint the model one color all over before adding my base coats to prevent natural preshading as resin is normally white or cream.
Warped items can be straightened by emersing in hot water straightening and then holding in place and allowing to cool down.
hope this helps
Cliff