Once your Kundalini rises, biokinesis will become an option. But before then, there's other solutions too.
You could ask the Gods for help on this matter. They might help you solve it in a number of different ways, like helping you improve your self-esteem (which will also make you more attractive because confidence is attractive to a lot of people), exposing you to beauty tips (like skin care, or maybe ideas for hairstyles or fashion), or instilling you with a sense of motivation to work on your figure, such as a diet and physical exercise.
But you probably don't really need to ask the Gods for help with this. Beauty and fashion tips can be found online. Motivation can be found by meditating. Self-esteem can also be improved by meditating.
You could also use a magickal working to help yourself. Although physical changes require a lot of energy, mental changes are much easier. Using the three steps of witchcraft, you can make a working that may help you tremendously, even if you lack the energy for significant physical changes.
Below is a working I came up with on the spot. Start when the Moon waxing and preferably almost full and is in Leo, Sagittarius, or Virgo. Make sure that the Moon is not "Void of Course" when you start. Follow the following steps once a day for 40 days in a row, preferably during Jupiter, Sun or Venus hours:
1. Clean your aura.
2. Raise energies (for example using 666 energy raising and/or some repetitions of SATANAS).
3. Vibrate AUM.
4a. If you want to be attractive in a masculine way, then vibrate ÜRUZ 44 times.
4b. If you want to be attractive in a feminine way, then vibrate BJÖRK 44 times.
5. Vibrate SOWILO 44 times.
6. Affirm 9 times: "I am beautiful, and am constantly continuing to become more beautiful and attractive to both myself and others in a positive and healthy way for me."
7. Vibrate AUM.
If your mind wanders to the magick throughout the day, just focus on letting the magick doing its thing and don't worry about it too much.
If you do it properly, the effects on your mindset will be profound. If your energy levels are sufficient, there may also be minor physical changes directly from the working. But even without that, it'll make you feel motivated and capable of doing things that make you more attractive, like putting on nice clothes because you feel like you deserve to, or taking better care of your hygiene so you can indulge in your own beauty even more. It'll also give you a more positive attitude as your self-esteem issues are solved, which will make people enjoy being around you more as well. I'm not sure on this, but theoretically, it might even give your aura an effect that causes people to perceive you as more attractive, too.
Whatever you decide to do, I'm sure you'll succeed if you put your mind to it.