Is it OK that I solder inside my bedroom?
It is a good idea to you wash your hands after using the leaded solder or else it can sometimes get stored inside the brain. Make sure you use a fume extractor (or if the area is well ventilated a PC fan will do the job).
Also lead-free solder can actually be worse than leaded solder due to the fact that they replace the lead with other chemicals which release toxic fumes.