A word on overweight guys, from an overweight guy. It's not necessarily your looks holding you back. It's the pre-conceived notions that women have about you and your own self-esteem that can lower your dating opportunities. Women have a lot of negative views of overweight men that you have to prove wrong, and you will be given an opportunity to do so eventually. They think you have higher estrogen (I've already done the research, it's not true) and overall, they think you're not as strong or manly as the thinner guys. This is because they saw low self-esteem overweight guys being made fun of in middle/high school and not doing anything about it. Now I'm one of those guys that got made fun of, tried to roast back, and failed. I didn't know it at the time, but this lowered my chances with women immensely. As I got older, I stopped playing the dozens, and decided if someone tries to roast/humiliate me, I'm putting hands on them, and you should too. You can't let people get away with disrespecting you.
So online dating is going to be harder for overweight guys, because women don't see you in a social environment and how people are responding to you. They still think it's high school rules, but many overweight guys are no longer allowing people to humiliate them. Basically, just going outside and not getting roasted to hell will start making them see you differently. Just that alone. Women are not stupid. They can see if something has changed, even if just a little bit.