I guess what you mean by online marketing business is selling online. Although you have not specified what you want to sell. I suggest that presently you are running the Mahadasha of Saturn and antardasha of Saturn till October 2019. Also your Sade satti is not over for next 4 months as Saturn turns retrograde.
As per your horoscope you will eventually do your own work, but it may not be the best period to invest your money till 2019. Therefore focus on job and keep planning of what you want to do. As your natal chart has 10th Lord Mars is combust and debilitated, it is best to do remedies to improve your 10th house.