-My mom and grandma first taught me when I was young, and learned more during school. But it never got into my head until now.
-Yes, it's basically loops and interlocking threads to make a pattern out of it. There are very many techniques depending how you want the finished product to look. There are for example a LOT of different patterns and textures you can put on the thing you're crocheting/knitting.
-Amigurumi bear for crochet? Simply two spheres assembled together with arms and legs and ears. Or maybe you can make a snowman? Then you don't have to think about the ears or arms or legs lol. It's pretty easy once you get the hang of it, but I suggest you watch a video or something because if you are a beginner, you won't understand how to read patterns. But a scarf is really a great way to get used to crochet and knitting.
-You would need to know the basics. Lol.. The basic stitches is important, for example starting, single/double stitches, increasing and decreasing and binding off. And how to differ each stitches when looking at the project (in case you get lost)
-I think it's worth it. Once you've finished a project you will feel incredibly proud of yourself. Also if you are making something for someone, you are truly putting your heart and mind into this, because it takes a LOT of patience. Oh yes there are fustrating parts.. as I said you need patience, and also if you lose count of stitches or just totally lost (this is why a stitch-marker is awesome) and cannot continue. You would need to start over again if you cant go back to somewhere you can get on back on track again. Otherwise it's a pretty great way to pass time.