Do you have existing credit cards with a good payment history?
If not, probably a secured card is the best way to re establish. Also remember these things, your FICO score is based on several factors:
Account balances in relation to the credit limit. Stay around 22% of your high credit, max. Any higher will not benefit you.
Pay on time-obvious.
Try not to apply for too much credit cause inquiries lower your score.
Get your free annual credit report & find out what you're up against.
I would be happy to run a simulator for you, it doesn't cost you anything and we can see what the best actions would be to improve your credit.
Here are a couple things I can simulate:
If you have debt, and money to pay down the debt what the score improvement can/will be.
If you have lack of credit history and need to get a credit card, I can simulate that
Paying off a collection - usually a bad idea
Time up to 2 years, if credit isn't good now I can tell you what it would be month to month up to 2 years assuming nothing changes with your credit outside of normal monthly payments
Deleting collection accounts via a settlement route
Among other things depending on the scenario
Feel free to reach out to me if you'd like to do this, it's usually some thing I will do for people that need to get their score up to qualify or if they can get above a certain threshold and get a better interest rate I will also run it.