Bitcoin is more acceptable now. Many freelance sites out there pay in BTC. Now 1 bitcoin is worth more than some monthly income. In other parts if tge world, it is 2 to 3 years wages. Many BTC ATMs exist as well.
It's 2-3 months salary where I live.
Back to OP. It would be really hard to get that much btc in a short time if you don't have anything you can give in exchange. If you have skill/service to sell, you can begin from there.
If not, your only other option is to buy btc using fiat and then try to grow that. Of course these would come with risks. For example you can lose money lending or trading btc.
IMHO the best set-up is to earn btc via skill/service trade while also buying btc every now and then when you have extra cash. Since the price rises, you can just keep your btc for it to grow. If you're making enough fiat from your day job you can avoid having to dig into your btc pile.