Back to basics. Kendra Wilkinson hit the gym for the first time in two years amid her GLP-1 weight loss journey. The former Playboy model shared her vulnerable return via Instagram Wednesday, admitting to her followers that she “hasn’t worked out in probably two years” and has “no idea” what she’s doing. “I don’t know where to start,” she confessed in an Instagram Stories clip. “Do I start with cardio? What do I do?” In another video, Wilkinson showed her “slow start” on the StairMaster alongside her 12-year-old daughter, Alijah. The “Girls Next Door” alum then moved on to some weight training. “Ended with cardio too. Whatever. Lol,” she…