Who has suggestions for improvement for my FUT 19 team on Xbox one?

So it's like this: I have 25k (am F2p) and an oke team but I do not know what to do with the coins. I play 4-5-1 and my team looks like this: ST: Uth LZOM: Sabitzer RZOM: Forsberg LM: Morales RM: Politano LV: Gaya RV: Vrsjalko LIV: Romagnoli RIV Rugani and TW: Sirigu. I would be very happy if someone had a suggestion or other ideas.

Always do squad building challenges and replace your team with better rated players from the same league

eg: at eng1 Harry Kane 👌