I am going to give you pretty decent advice, so listen up. Becoming a millionaire is so much harder if you're doing it by working a 9-5 job. Think LONG-TERM. Having a job is a great way to start making some cash flow, but you should use it to actually start a business. A job isn’t scalable. You only have 24 hours in a day. You have a limit or a cap of how much you can make with a regular 9-5 job. Having access to the internet is all you need, you can see that attention is now the new way to becoming successful. The more exposure your brand gets (whether that is from posts, social media, websites, blogs, etc) the more opportunities you have to monetize off your traffic. When you have a lot of people's attention, and you create a product, you’re likely to make a sale. This is scalable. Anything you put out on the internet compounds, continually getting more and more traffic that gives you a chance to make a sale.
Basically what you do is source products from china in bulk (dirt cheap) let's say you buy 200 units for the price of $2.50, and then you send it to Amazon's fulfillment centers and list those products for $15, You make a $12.50 Profit Per Unit you sell. I have a lot of days where I make $150 a day, I sometimes wake up in the morning with 50$ profit, etc. This is by far right now the best trend, I've searched a lot of different ways of making money, while most of them are bullshit. (cash apps, and surveys included) Affiliate Marketing works, but like I said before, you need traffic and that's rough to get for an average person.
I definitely recommend that you use some marketing (Facebook Ads, PPC, Instagram stories, etc) to keep your sales growing and healthy. I also recommend you slapping your own logo on your product (Tip: Don’t worry, it’s extremely easy to do this, you can outsource a logo for like $5 on Fiverr) Amazon isn’t a gimmick, get started now and don't wait! If you’re interested I have a step-by-step guide for beginners, explaining everything simply and giving my personal tips to grow your own business. You can rank your product on page 1 pretty easy and doing so will make your product viewed by hundreds of thousands of purchase ready customers. I strongly recommend if you're picking a product on Amazon to sell that you make sure it has steady search volume and has actual demand. You can't sell a dead-weight product if no one is searching for it. (tip: you can use google keyword planner / trends to see products that are trending.) Amazon isn’t a gimmick, get started now and don't wait! It's not saturated despite what people say. This takes work, so if you're willing to work at this then this WILL replace full time income. Hopefully that helps. Good luck