Team upgrades

This is my team now. I play 4231 wide. GK is sweeper keeper, both cb defender, rb/lb one on fullback and one on attacking wingback, both cdm holding, lm/rm inside forward, cam playmaker and st advanced forward. I’m looking to upgrade some players but I’m a bit lost. I don’t know what is meta and what not, so far I play just with players I like. Who should I buy? I have 160k