[KongoSan]

And I forgot to mention that even if your dawah attempt is successful, the person on the other side is still less likely to stay with Islam and strive to learn more about it. It's much easier having a support network, and the benefit of in-person dawah is that, you can guide the person to the nearest Mosque so they can learn first hand what is it like being a Muslim. You can even get their contact details and stay in touch with them and answer any questions they may have with regards to Islam. As a result, people are more likely to follow Islam and remain steadfast on the deen. It's also far easier to explain concepts to them and proclaim to them the Shahadah in person than through an online medium. There are also dangers to going on non-muslim forums, even if it is for good intentions like dawah, there is a lot of filth and haram stuff on non-muslims forums which you should most certainly avoid.

May Allah allow you to give dawah effectively to others and bring people to Islam.