Best tool for amazon

Hey guys, I’m wanting to start selling on Amazon but I’m not sure how to find the best suppliers. I’ve looked into tools like jungle scout and Skugrid but I’ve really got no clue which route to take, I’ve got salehoo but every supplier I find has bad reviews when I check BBB.org or trust pilot. Very overwhelming and so much dog shit information on the internet haha. Any help would be much appreciated, I just want to get my feet on the ground instead of wavering and waiting. Any suggestions would be amazing. Cheers