Help with 0 coins and barely andy new challenges done

Do the Black History Month solos first and insert the 88s into your lineup. They turn into 93s and 94s once you finish the challenges for them. Then do the ToTY solos to get a free BND 98 Overall. Then do the ToTW solos to get ToTY tokens to get an auctionable 98 overall player, which I would keep if I was you. Then do the Legend solos because you get a choice of whatever legend player you want at the end (there are 96 overalls available). By then, you should have a decent coin stack built up to buy another ToTY player. Put the two auctionable ToTY players into the Madden set to get a 99 LT and your choice of ANY 2 ToTY players.