Some people need a bit more then just confidence

It's not about confidence that she'll say yes -- that's not confidence, that's delusion.
It's about confidence that no matter how it turns out, you can deal with it.

Try practicing basic hygiene and grooming.

Massive conflation of personality and attractiveness. Fucking defeatist “boohoo I cant get a partner because I’m hopelessly unattractive” it’s like people take comfort in wallowing in that bs.
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If you really feel like you have bad hygiene then work on it, no one is stopping you from learning how to groom yourself.
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Feeling like your facial features are somehow unfixable is more a self esteem issue but even buttfuck ugly mofos can dress sharply and speak sharply and have a good over all appearance

You get your look from your ancestors and obviously, they got laid so it's not about your look really.

No matter what you look like- if you’re at least practicing basic hygiene, maybe some grooming or some level of effort to make the best of what you have: you’re like are what they are. You can’t change those but you can change your attitude and how you approach life. Do yeah- have confidence. Know that no mater what happens there, you’re going to be ok. If this one isn’t the one- another will be. If none are- you’ll still have a good life. The confidence people respond to is just that- the confidence of a person who is doing well and plans to keep doing well no matter what life brings.