If you have it next to an open window for ventilation, you can put a paper shopping bag or something over the cover to block uv light without blocking the fan.
Removing supports before curing the mini will leave the least amount of bits behind.
I recommend translucent resin; in my experience it cures better especially if you have a larger model that needs to be hollowed.
Only bother hollowing if you have more than a dime's* width of void in the model, and obviously make sure you have a hole to vent gas that would otherwise build up inside. (* no science to this, just my rule of thumb)
On holes: they don't need to be big, just make sure they are large enough to not be sealed by resin that accidently isn't washed off and then cured. (Definitely not something I've done no no)
Painting is fun, maybe start with cheaper brushes until you get a feel for resin models. If you are accustomed to painting plastic models, you will be surprised at the wear and tear the layer lines inflict on your bristles.