How to improve after a long break

Hi Guys! I have returned to chess after a year and half long break. I was Fide rapid rated 1435 back then. Now after 2-3 days of blitz, I am back to what my blitz rating was then on chess.com(Around 1450). However, I think I lack the tactics and the chess knowledge. Many of my friends are now better than me. How can I catch up fast and improve to be better than 1400? My goal is to have an approximate strength of 1600 by the end of this year.

 i also have the same problem i also need help please

This is the best place for improvement   https://chessmood.com/courses

Thank you so much

you’re welcome