(somewhat) beginner to fishing <need tips!>

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so that zebco snapped and i ended up getting a better pole and reel combo that had no line on. I bought some 10 pound line, and i used a uni knot, and made the spool of line come off counter clockwise, and tried my best to keep the line tight, but the line still twisted every now and then and when i test-casted it, it didnt go very far and when i reeled it in, the line came off that little bar thats on open faced reels. So i took all of the line back off. Anyone got any tips/quality videos on how to spool line on an open face? Please respond asap.
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