New to Fly Fishing. HELP!!!!!

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I am very new to Fly Fishing and to fishing in general. I went fly fishing late last fall in Yellowstone National Park and I fell in love with it very fast. I recently bought a beginner fly rod and real set and I am wondering if anyone can tell me if i made a good choice. I purchased a Redington Crosswater No. 5 line 9'. The rod also came with a crosswater 4/5/6 reel. The reel that came with the set seems like it is made of plastic, but seems like it is good enough to learn with I hope. Also wondering if anyone knows any good websites about knots for tying fly to leader and leader to fly? Pretty much I am so new that any tips or any info would be much appriciated.
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