For anyone serious about playing this collection, which I recommend despite my critical analysis above, I suggest this single video to help overcome the old fashioned camera and to understand the basis of movement and defense in the series. It applies to every game and it will help you play and appreciate them.
Feel free to bookmark it for later.
[EDIT] You only need the first 10 minutes. It starts with the concept of roll jumping and then at the 7 minute mark he talks about the camera. He says there are some differences with Sigma 1 but it’s the same concept. Both roll jumping and camera problems became less important in the sequels, and by then you should know what you’re doing anyway.