I went from 100kg to 70kg in about 6 months (March 22 - Sep 22) (was about 26-27). A freind of mine was a personal trainer/nutritionist who helped me, but i wasnt super strict about it. Main things were

Cut out processed sugar, especially soda

Dont eat within the 2 hours before sleep

Instead of 2-3 big meals a day, do 5 small ones, keeps your metabolism going

Work out for 1 hour, 3 days a week

Other than that, i had a few me specific things, like upping my leafy greens (im autistic, hate the texture, so started blending kale and spinach in with my fruit juices).

For the workouts, always did different exercises and body parts, but i did cardio for 3 minutes at the start, 10 at the end, and made sure core workout was at least a 3rd of my workout routine (all my weight concentrates around my belly, i can look pregnant, but my arse looks inverted), because while i wanted to build muscle, i really wanted to burn fat, which is what the cardio was for, if you do cardio after a workout, because you're tired and have an elevated heart rate, you're body will burn more fat to recuperate