Feeling discouraged (A bit long)

I've been trying to get back to the dating world. I've never really had a serious relationship. I would like to settle down in the future and start a family. There's just one problem. I've tried to start back online dating. I've tried it a few years back but I've never been successful. I decided why not give it a try but haven't been so lucky. I'll send a message and I noticed people view my profile but never seem to be interested. I've tried several dating sites in the past but never seem to have anyone interested in me. The ones that do send me a message or flirt are not really my type and/or they're younger men who are like 18-21 but I'm 24 going on 25. I even put a minimum age limit. I'm getting older and my biological clock is ticking. I even go out to meet new people but I guess I'm not as pretty as I used to be. I don't know what's wrong with me. I don't put too much on my profile or too little. I make sure to give the right amount of information. I'm a chef and you would think that since men like to eat they would be interested especially with all the other things about me. I just want to give up on finding someone and just say forget it. I'm not desperate but it would be nice to have someone to call your own. What am I doing wrong? Am I ugly? Does anyone have any tips for dating? I think I'm just destined to be alone.