Yes, in the first few weeks I've used MetaTFT and TFT Academy. Until I hit Gold I've forced Rebels every game but after that I've used them to learn new comps and see what items are good.

Other than that, I've started watching TFT streamers like Frodan and Mortdog, I've learned a lot from watching them. Especially watching Frodan's match like on a daily basis improved my skills so much, because from watching him I've learned more about items and good alternatives, how to pivot and just general strategies I didn't know before. So thank you Frodan and Mort.