As for balancing things between marriage and career, I would strongly advise you to not stress about it as marriage is a part of life and will help you focus better and not get distracted with all the hormonal changes and needs as well as the Temptations out there. Marriage protects you from the sinful lifestyle, which ultimately leads to success in this world, and then the hereafter. As for your parents, I would suggest that you seek help from wise members of your community or family. Perhaps your local scholar. Also, sharing traditions from the holy prophet and his purified, family peace be upon them about the significance and benefits of early marriages.