Wow, I guess your parents are the ones supporting you all this time. They should be retiring soon I guess. Timing-wise, you came out to look for work at a bad time. Yes, there are many gig jobs, but due to the massive number of ppl doing it, companies have scaled down the commissions. It means fewer jobs per gig worker with smaller commissions.

Sales is low entry, but currently, there are a lot of jobless sales ppl. They were one of the first waves of ppl who got fired when ppl can no longer travel around the region. No point keeping them if your sales team cannot go out of Singapore. They have years of experience, networks and they are jobless. You have to look around but the competition is fierce.

You should consider getting a driver's license and work as Grab or taxi driver. This is an industry that doesn't ask a lot of questions and is often used as a buffer for middle age PMET who lose their job in their 40s or 50s. The timing is flexible, you are your own boss, and you don't have to deal with office politics. Just make sure you pay your rentals on time, and no one will bother you. I made the assumption that you are an extreme introvert.

Basically, any job that requires an interview process will present some problems for you. Your lack of job history is a major red flag for HR.