Happy new year! I'm new to pistols (30 days) and just purchased a slightly used (owner had it for about a month) G21 SF. I'm hoping to shoot it later this week. I'm having a tough time with the slide lever lock and will be ordering an extended one shortly once I decide where to get it from. Suggestions? I also had a 3.5# connector installed. I've got a lot to learn about pistols in general, but am reading this forum & the XD Talk to get more familiar with my recent purchases. I also plan on taking a CCW class even though I don't intend on carrying anytime soon. Any recommendations on other courses or suggestions in general would be most appreciated. Looking forward to learning as much as I can and making some new friends along the way!