Squat, deadlift, bench.
Do 3x10 or so warmup sets with 50 and 75% your working weights.
Then 3x6-8 work sets. First 3x6, next session 3x7, after that 3x8. When you can do 8,8,8, add weight and drop the reps back to 6. As for weight, increase by 5kg a time for squat and deadlift, 2.5kg a time for bench.
If you stall and can't make the reps, add a fourth set. If next session you still can't make the reps, add a fourth and then a fifth set.
Do this three days a week with a full clear day in between.
Eat LOTS of fresh fruit and vegies, LOTS of nuts and beans, SOME meat, fish and dairy every day. If you want to get overall bigger, eat MORE starchy food (oats, rice, bread, pasta - always wholegrain - and spuds); if you want to get overall smaller, eat less.
When you can bench your 20kg bar with 1x20kg plate each side, squat with 2x20kg a side, and deadlift with 3x20kg a side, keep doing this routine, but once a week do clean and press, chins, and whatever other exercises you feel like.
When you can bench the bar with 2 plates a side, squat with 3, and deadlift 4, you're not a beginner anymore and I can't advise you. But that should take you 6-24 months.
Good luck.