How to help, gay brother

So I think my brother might be gay. I say might because I have talked to him about it and he isn't sure either. He is a little introverted and shy. A few years ago, it somehow came up in conversation, and he deflected it. I guess I kind of thought he would explore it in a way which he was comfortable with. However, he is 25 now and is still uneasy about dating and his sexuality. We grew up in a pretty conservative and Catholic community, so I think that probably makes him a little hesitant about fully coming out. However, our family isn't that religious anymore and we are pretty liberal now. My mom and I both know that he may be gay and we are completely supportive. From what he's told us, we are the only one he's ever really mentioned this too, and even then, he is still very hesitant to talk about it. I think the most important thing is for him to talk to other people who are gay and to explore for himself. He doesn't know how to go about it and I don't know what to suggest. He recently asked me for advice about an online dating profile he created. This was a really big step. However, it was on a heterosexual dating website and he said he was looking for men. I cautioned him that if he wasn't ready to come out to his friends, he should be wary as someone he knew could see this and I also didn't believe that this site would exactly be the best medium. I really don't think I am the best person to make suggestions, but I suggested that he try grindr. At least that way, he could talk to gay people in a more relaxed environment. However, he raised the point that a lot of people use this for simply hooking up, which was not what he was looking for.I want my brother to be comfortable with his sexuality, but he is pretty shy and sensitive. He has never been in a relationship or even dated. I have some gay friends, but my brother does not want me to talk to them about it because he is not ready for anyone we know to know. I want to be supportive and help him, but I don't know how. Any advice would be appreciated.