I'm was a fat-ass. I started doing cardio last year (45min continuous jogging by gradual buildup) 3-5 days a week and reduced my weight massively (110kg -> 90 kg). But I still have flabs (loose skin maybe?). Height is 5'11
I have bought weights and a bench-press. Any guide on what weight exercises I should be doing?
Ease up on the cardio. 2 days a week are more than enough, and try to do more HIIT and less LISS.
Focus on compound exercises first: Squat, Bench press, Deadlift, pullups. Watch as many videos as you can on the form of these exercises. Youtube is full of them. For beginners, I recommend Jeremy Ethier, AthleanX, and Scotthermanfitness. Subscribe to them.
Form is EXTREMELY IMPORTANT especially with deadlift. I've seen tons of people deadlift with shitty form, fuck their back up completely, and then blame the exercise.
You must focus on progressive overload and try to get stronger over time. You will build muscle in the process. Once you build muscle, the lose skin will go away.
One last thing; fitness is a lifestyle. Dont think you can forget it once you've reached your target weight. It's part of your life now. Start with getting your basics down, and then start a hypertrophy program like "push, pull, legs". In future you can build your own complex custom workout program. Just NEVER STOP LEARNING.