Is mining with the PC even a option anymore?
Mining on PC with GPU is still an option for some altcoins but mining bitcoin with PC is not profitable anymore. You will need to buy mining equipments(miners) if you want to continue bitcoin mining.
Are faucets even worth it?
Don't waste your time on faucets because they are not viable to use to gain btc anymore. It would be wiser to just find a job rather than doing captcha all day on faucets.
What's the best way to get back into this with having literally no income to actually invest with?
The best way to get back into earning bitcoin without investing a cent is to offer your skills to others like how one does it in real life, you can also be a freelancer.