The only supplement that is 'needed' is a healthy and balanced diet. Make sure you eat enough, you can't build muscle from nothing.
As for a workout routine, almost all of the basic pre-made routines will work well for you. Just pick something that fits your likes, time requirements, available equipment, and uses big compound lifts like squats and deadlifts.
The final ingredients are Time and Effort. Keep adding more reps and more weight to the bar, week after week, and in a few years those little steps will add up to BIG gains.
Good luck to you, keep us involved in your journey, and welcome to the forum.