Personally prefer non safety chains. Possibility of kick back is there no matter the chain. Just as much depends on the experience level of the person sawing. Try to keep the bar out of any sort of bind. If kerf is closing up use a plastic or wood wedge to hold kerf open until cut is finished. Especially watch the top half of the curvature at the end of the bar from cutting. That's where a more serious kick back can start to occur.
Hand filing takes experience but there are multiple reasons to learn how. Cheaper, more convenient, less wear and tear on chains/longer life, often better/sharper chain... Probably best at this point to stay true to the angle that comes with the chain and let the cutter edge be your guide for this. The angle of the edge determines how aggressive the chain cuts and how durable it is in dirty "wood." Sharper the angle the more agressive but will dull quicker in dirty wood. If you are inexperienced, get some gadget to use as a filing guide. Most common is a clamp on device which helps you file with the correct angle and keeps the depth of the file correct with respect to the edge of the cutter tooth. There are other better devices including the File-O-Plate, (Two recent threads on this subject.) and Granberg filing device. Both of these are available from Bailey's, site sponsor. You need to research this to make sure you get what you need. Just keep practicing!
