Sam, I would guess you have everything you need already. I would consider taking a course, buying some books, etc. You need to get out and practice. After awhile you will have a good idea what you want to keep of your current gear and what new kit you might want to purchase. One thing you have to guard against though is becoming discouraged. You might ask yourself how you would fare if you went into the woods for 4 or 5 days and it rained that whole time. This can discourage the newcomer. Sometimes the best thing to do is to set up a "regular" camp with a tent and other creature comforts, and then venture out into the woods and practice more typical bushcraft skils like fire building without matches or building a shelter, or catching fish with just a hook and line from a mini survival kit. The best way to know what you need to learn by doing. But when you are "doing," just make sure you are prepared enough that you dont' accidently put yourself into a life threatening REAL survival situation. This could be as simple (and deadly) as becoming chilled and hypothermic. Good luck and stay safe.
. . . deliverance will not come from the rushing, noisy centres of civilization. It will come from the lonely places. - Fridtjof Nansen