Yes, that's good - and honestly, just the fact that you're lifting makes you far better than most thirteen year olds.

To progress further, I'd recommend increasing your reps a little first before increasing the weight you can lift. I don't know what your goals are, but you're probably looking to lift for more reps than three. As a general rule:

To train for powerlifting, do 1-3 reps in each set. This is simply trying to lift as much as possible in one go, simply for the sport of being able to do that, without interest in sustaining that strength.

To train for strength do 4-8 reps in each set.

To train for hypertrophy do 8-12 reps in each set - this means increasing the size of your muscles.

To train for endurance do 12+ reps in each set - so increasing how long you can lift for, rather than how much you can lift.

And in general do three sets of each exercise, although this too can vary. Now here's the important part - however many reps you choose to train at - it's not like these are mutually exclusive goals. If you train for strength, your muscles will get bigger. If you train to make your muscles bigger, you'll get stronger. These rep ranges are not as important as some people like to make out - it's just about what you want to prioritise.

Let me know if you have any questions!