The temptation will be to do it on the cheap and avoid high cost of insulated chimney. Make sure you have spark arrester. The roof could be vulnerable. You will need to fireproof the floor area and not cheat on setbacks from walls. Cheaper stoves are often metal and provide fast heat even with a roll of newspaper but can overheat easily. Anything involving fire can be dangerous but if you do it carefully and have some functioning battery operated fire alarms you should be ok. Danger is always while sleeping. Dry wood will make a huge difference to your heating and safety. Check your chimney regularly. Purchase fire prevention products that will extinguish a fire in fireplace and of course a good fire extinguisher. Best to have stove that burns closed. Better heat and safer. Good luck.