I think yours is all right! You can not increase your size!
Your penis is overweighted and too long.
To elevate your erection angle, you have to develop a powerful penile suspending ligament near the pubis to lift up your heavy cantilever beam!
Your more powerful shooting and harder erection indicate that you are in the right direction. Couple impotant factors of improving the erection angle are:
1. Your testosterone - you do not reach your peak power yet. Your physical peak is aroung 18-25.
2. The strengthen of the penile suspension ligament - Constantly massaging the pubis to erect your penis will bring in more testosterone to the ligament and the weight of your erecting penis will help you tone your ligament. Don't attempt to use penile weight lifting to overkill your your penis. Penile weight hanging with a towel or clothes may help.
3. Masturbation - don't increase your maturbation frequency. Your body will increase your testosterone production from now on and your libido will start to jump up. Use the testosterone to tune the penile ligament rather than drain it out by masturbation.