Brand new to FBA

Started looking into fba going to try RA. I’m looking to make some extra money on the side because money is extremely tight even with my 9-5 job. My amazon fba account is currently pending. Any information would be greatly appreciated as I have never dabbled in anything like this. What are some supplies I should have and what items are best to resell when starting out. I’m not looking for thousands of dollars just a few extra hundred a month. Thanks