Have you tried volunteering??
I know that it won't give you an immediate job but it's something that I've had on my mind for a long time that could be useful in the future (I mean like having volunteering on your work bio). It can be a perfect way to see what you're good at, develop new skills and it can give you connections for future jobs. If you need something quick, go for jobs like cleaner/maid/butler or a caregiver for elders (some homes require a course diploma but not all of them, some don't even look for work experience).
Also, I feel the same way. I'm not qualified for the majority of jobs that are offered in my country at the moment (waiter, builder/construction worker, nurse, programmer) and I'm not sure what I'm good at tbh but I feel like I need to start with something simple (jobs that don't require qualifications and have a decent salary) so that I can gradually find a job that will suit for me.
I've only had a summer job at a gas station as a car cleaner, so I can't say I've had the same struggles as you, but I've had many people around me who have had the same experience and were always sharing their frustrations about it. They kept searching, even if there are no jobs on the website then they would follow companies on fb or instagram in case they are offering a job or they would message them immediately. Just know that you are not alone in this and I'm sure there will be jobs that you'll feel comfortable with or be qualified for.
Sry if there are some English mistakes lol