How to increase credit score in the next few months?

Hey folks I’ve been trying to focus on my credit lately because I’d really like to finance a decent car. I’ve read a bunch of stuff online about how to increase credit score but it’s honestly overwhelming.

Some sources say get a secured credit card others say become an authorized user, some mention paying twice a month, credit builder loans and the list goes on. I’ve been paying off some debts and keeping my utilization low but I’m not really seeing a big jump yet.

If anyone here has improved their score by 50+ points in a relatively short time, what worked best for you?