Its a good team for a Level 1 team, hopefully with a good bit of simple man-management, like watching games, making subs, regular training, I don't feel theres any need to invest in new players until you win promotion to Level 2 so you can save up a few tokens, once your Level 2, your 3* players become 2* and those older 2* players will have to be released on a free transfer (nobody will want those players sadly) and replaced with new 5* players, get to know how the transfer market works and the bidding/knockout system by watching a few auctions on players and learn how to get 5* quality on the cheap.

That team you currently have and some of the 5* players already there should be more than good enough to ensure you finish in the Top 4, which will ensure you qualify for the Champions League next season which will bring a lot of extra income for your team.