It may be easier for us to help you if you go to the Case Study group and look at the spreadsheet it provides for giving the group information about how you spend your money. The other thing that will really help is seeing where your money is going now. If you do not have a budget start one. People here typically use YNAB or Mint to track their spending. Some do it just with an Excel Spreadsheet. First thing you need is to know where your money is going so you can see where you are bleeding the worst.
First thing PAYOFF the non-zero interest cards. The best strategy is to pay them off according to the highest interest rate.
Chase Freedom $3600 @ 27%
Total Rewards Visa $1500 @ 24%
Capital One $4500 @ 19%
Discover $4000 @ 19%
= $13,600
BestBuy $400 @ 0%
Barclay $5000 @ 0%
Chase Slate $1500 @ 0%
= $6900
American Express Blue is at ZERO balance
It is up to you whether you want to pay the zero interest ones now, but definitely pay them off before they start collecting interest.
As far as future card use. You should only put on your cc whatever you are able to pay in full each month. Do not carry any balances. There are numerous types of rewards cards. I personally do not travel much so I do not use the ones that collect travel points. I currently have a Visa, MC, and Discover that I use regularly that are used based on their rewards.
In the Investment forum there is a thread for investment order
https://forum.mrmoneymustache.com/investor-alley/investment-order/. After you get your budget figured out and know how much you are able to save follow the order to maximize your investment dollars.
Right now you can still contribute to your 2017 IRA so you can do that and not loose out on that as well.
As far as checking and savings accounts there are way too many out there. I personally use a credit union that is brick and mortar and has helped with really good interest rate loans. Also I use a couple online only banks. I recently found CIT Bank which has a 1.53% APY, but not particularly fond of its utility. The other bank I use is Capital One. This one I pay all my bills and stuff from. You really only need to keep enough cash liquid in a bank account for the emergency fund and current monthly bills.
You said you pay $100 for your phone. That is way too much. There are many prepaid carriers out there that you can get as low as $15 a month. Check them out. Republic Wireless, Cricket, Metro PCS, MintSim, etc.
As far as the car, as long as it does not start to cost a lot for repairs and maintenance drive it until it dies.
Will you be working at a place where you will have 401k or other accounts to build for retirement?