Jalousie and awning type windows are not very secure because individual panes are easy to pry or remove. You may want to install metal grating on the inside of the windows, or consider replacing them entirely with a more secure type. A primary consideration is easy exit from all points of entry into your home. If you are considering an alarm system, carefully select the installer to assure that you get adequate protection, but not a system far more costly than you need. An effective alarm system should protect all points of entry into your home.
Price is no guarantee of quality.
Your local police or sheriff's department may be able to help you determine the best system for your needs. Now that you've protected your home, look around the outside. Remember, the burglar is looking for easy opportunity. Protect your protection. Trim all trees, bushes and shrubs that offer concealment.