@Marinus That's great action-taking. 31 daytime approaches is a lot.
There are many stages to a successful pickup that must be mastered: the open, body language, the smile, eye contact, keeping conversations going, flirtation, kino/touching, authenticity, sexual tension, hitting a hook point, screening for boyfriend, getting the close, leading and pulling for instant date, number closing, etc.
It's quite hard to learn all those on your own. It helps to go with a wing-man who already has experience with this and can help you evaluate your interactions. Try to find some wings in your city.
A successful daytime approach requires a lot more than just opening the girl and saying Hi. You must learn to make the conversation fun, flirty, and interesting. And you must learn how to close in order to get any results. All daytime approaches must end with you asking the girl for an insta-date coffee.
Yes, you will be very awkward and mechanical at first. But you can quickly improve. Your goal should be to approach a girl in the same way you might approach and talk to your own girlfriend. It has to be very natural, like it's no big deal, like you've known her your own life. You must just assume this vibe and sense of friendship and familiarity right off the bat. It has to be super casual so the girl is not put on guard.
A great way to practice conversation skills and body language is by chatting with store clerks at the mall. Go find some girl clerks. They are bored most the day and will be happy to talk with you. Try to flirt with them a bit without outright hitting on them. Try to get them to open up about themselves. Try to charm them a bit. Tease them. Wink and smile at them. Tell them some stories about yourself, etc.
At this point your goal is not even to have sex but simply to become a more social, extroverted, talkative, charismatic person. You can even practice on guys and old ladies. Get good at small-talk and self-expression to strangers. Get good at building rapid social comfort, so people are comfortable around you. So they feel you as a fun friendly guy.
I love day game. The biggest problem with it is that it's not easy to find a lot of hot girls during the day unless you live near certain great locations. Cities like LA, London, and NYC are amazing for daygame, but most cities aren't.
The advantage of night is that you get a lot more girls to talk to. And there's possibilities for same night pulls.
Oh, it's also VERY IMPORTANT that when you approach a girl during the day you stop her and face up to her squarely, face to face. Do not be approaching girls from the back or the side. If she is walking, you must stop her cold by getting her attention. You must face her directly. You must have her full attention before you deliver your opener. Do not be whispering your opener to her side or back as she is walking. Run around her and stop her without scaring her. And you must always open with a smile. If there is a look of fear on your face, she will freak out. Practice that smile like your life depends on it.

He's got so much self-esteem, 6 would be too much
@Pilgrim There is a deeper existential issue at work here beyond ordinary self-esteem. See, virtually every ego feels like it's not good enough. This is a deeper problem than it first seems. To be an ego is to constantly feel incomplete, inadequate, unlovable, and worthless.
That is solved by spiritual practice and consciousness work. You need to become conscious of how incompleteness, inadequacy, and being unlovable are part of the entire dynamic of being human. These things are the consequence of your deepest held beliefs about life. Those beliefs need to be questioned very deeply.
For example, who what is nobody loves you. Why is that bad or wrong? Why do you need love from others? Contemplate that seriously until you realize that you actually do not need love from others. This will feel counter-intuitive. There will be fear here that you must face head-on.
Sounds like you should have no problem finding a man as long as you are going out and socializing. Setting boundaries is a separate matter. To set decent boundaries you need to resolve your self-esteem issues.
You might also want to be more conscious of how you screen men. Get more clear about what you want in a man and what you don't want. Be honest about whether your ideal man is actually something you're attracted to. For example, you may say you want a sensitive empathetic man, but then in practice you actually get turned on by loud-mouthed charismatic assholes who would sell their own mothers a lemon car. Often what you get attracted to on the front end is not the ideal guy to be in a relationship with.
The man is not going to help you believe in yourself. You must do that on your own.